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Sledgehammer
Sledgehammer
Sledgehammer
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Sledgehammer
20-pound (9.1 kg) and 10-pound (4.5 kg) sledgehammers
ClassificationHand tool; Improvised weapon
Used withWedge; hammer wrench
RelatedWar hammer

A sledgehammer is a tool with a large, flat, massive, often metal head, attached to a long wooden or solid handle. The long handle is combined with a heavy head which allows the sledgehammer to pick up momentum during a swing and apply a large force compared to hammers designed to drive nails. Along with the mallet, it shares the ability to distribute force over a wide area. This is in contrast to other types of hammers, which concentrate gravity and force in a relatively small area.

Etymology

[edit]
A straight peen sledge hammer from an 1899 American book on blacksmithing

The word sledgehammer is derived from the Old-English "slægan", which, in its first sense, means "to strike violently". The English words "slag", "slay", and "slog" are cognates.[1][2]

Uses

[edit]
Spike maul used for driving railroad spikes during track construction

The handle can range from 50 centimetres (1 ft 8 in) to a full 1 metre (3 ft 3 in) long, depending on the mass of the head.[3] The head mass is usually 1 to 9 kilograms (2.2 to 19.8 lb). Modern heavy duty sledgehammers come with 10-to-20-pound (4.5–9.1 kg) heads. Sledgehammers usually require two hands and a swinging motion involving the entire torso, in contrast to smaller hammers used for driving in nails. The combination of a long swinging range, and heavy head, increases the force of the resulting impact.[citation needed]

Sledgehammers are often used in demolition work, for breaking through drywall or masonry walls. Sledgehammers were formerly widely used in mining operations, particularly hand steel, but are rarely used in modern mining. Sledgehammers are also used when substantial force is necessary to dislodge a trapped object (often in farm or oil field work), or for fracturing concrete. Another common use is for driving fence posts into the ground. Sledgehammers are used by police forces in raids on property to gain entry by force, commonly through doors. They were and still are commonly used by blacksmiths to shape heavy sections of iron. The British SAS counter terrorist team used sledgehammers to gain access to rooms during the 1980 Iranian Embassy Siege. However, today they use a tool called a "dynamic hammer".[citation needed]

Another use of sledgehammers is for driving railroad spikes into wooden sleepers during rail construction. When the two ends of the Union Pacific railroad were joined at Promontory, Utah, Leland Stanford hammered a golden spike into a sleeper with a silver hammer.[4] Sledges used to drive spikes for rails had curved heads[citation needed] that came down to a "beak" that was only about one inch across. The shape meant that drivers needed to be accurate, and spot where the spike hit was often not much larger than a small coin, as anything larger would hit the plate or the sleeper. The curved head kept the handle away from the rail, as the spikes were driven with the rail between the spike and the driver. These are often called spike mauls.[citation needed]

Drilling hammer

[edit]
A man cutting a paving stone using a drilling hammer to drive a chisel
Drilling hammer

A drilling hammer,[5] club hammer, lump hammer, crack hammer, mini-sledge or thor hammer is a small sledgehammer whose relatively light weight and short handle allow one-handed use.[6] It is useful for light demolition work, driving masonry nails, and for use with a steel chisel when cutting stone or metal.[7] In this last application, its weight drives the chisel more deeply into the material being cut than lighter hammers. Club hammers are common on the British inland waterways for driving mooring pins into the towpath or canal bank.[citation needed]

Scouts BSA[8] has adopted the shorter sledgehammer, commonly referred to as an engineer's hammer,[9] as an unofficial tool referred to as the scout hammer, as a complement to the pocket knife and hand axe. The handle is 12–18 inches (30–46 cm) long with a head weighing 2 to 6 lb (0.91–2.72 kg). The hammer is used for a variety of purposes such as driving tent stakes, establishing temporary fencing using wood or metal rebar, splitting wood in conjunction with a wedge, or straightening bent objects.[citation needed]

Post maul

[edit]
Post maul

Post mauls are similar to sledgehammers in shape but are meant to drive wooden fence posts or tree stakes into the earth. Newer mauls have broad, flat circular faces that are significantly larger in diameter than the body of the head (where the handle attaches). Older post mauls are significantly larger than sledgehammers like their newer counterparts except the outside diameter (body) of older post maul designs remained the same large diameter as that of the faces of the hammer from one side to the other side. Sledgehammers usually have octagonal faces that are the same diameter or slightly smaller than the body of the head, and they are not nearly as large in overall diameter as a post maul.[citation needed]

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Sledgehammer

View on Grokipedia
from Grokipedia
{{About|the tool|other uses|Sledgehammer (disambiguation)}} A sledgehammer is a large, heavy-duty consisting of a flat, massive head—often made of metal—attached to a long handle, typically wielded with both hands to deliver powerful blows. It is primarily designed for tasks requiring significant force, such as breaking , driving stakes, or metal. Their robust build distinguishes them from lighter hammers, emphasizing raw power over precision.

Etymology and History

Etymology

The term "sledgehammer" originates as a compound word combining "sledge," referring to a large, heavy striking tool, with "," the general term for a handheld implement used for pounding or driving. In , the root word appears as slecg, denoting a sledgehammer or , derived from the slean meaning "to strike, smite, or beat violently." This etymon traces back to Proto-Germanic *slahan or *slagjaną, an form signifying "to strike" or "to hit," which underscores the tool's primary function of delivering powerful blows. During the period (circa 1100–1500), the word evolved into slegge or sleǧǧe, retaining its association with a heavy suitable for blacksmithing or heavy labor, as evidenced in texts from the late . This form reflects linguistic continuity from while adapting to Anglo-Norman influences on English vocabulary. Cognates appear in other , such as slegge (a large ) and forms derived from slahan ("to strike"), later becoming modern German Schlägel from schlagen ("to strike" or "to beat"), illustrating a shared Proto-Germanic heritage across Northern European tongues. The specifically distinguishes the sledgehammer from lighter, one-handed hammers by emphasizing its scale and two-handed operation, a embedded in its etymological roots tied to violent or forceful striking actions rather than precise . This semantic focus on heft and impact has persisted, setting it apart in tool since its earliest recorded uses in the late .

Historical Development

The sledgehammer's earliest precursors were prehistoric stone mauls, heavy pounding tools hafted to wooden handles, with archaeological examples dating back to the Late Archaic period around 3000 BCE. These rudimentary implements evolved from simpler hammerstones used in the era for tasks like cracking nuts or shaping materials, marking the beginning of specialized striking tools in human societies. By the circa 3000 BCE, ancient civilizations in and transitioned to metal versions, crafting hammerheads from alloys for greater durability in and early . In , such tools facilitated monumental building projects, including the use of and later iron sledgehammers to drive wedges into stone for quarrying obelisks and blocks. The advent of the around 1200 BCE further refined these designs, with iron hammers becoming standard in Mesopotamian forges for shaping weapons and agricultural implements. In medieval Europe, from the onward, sledgehammers gained prominence in blacksmithing and construction, as documented in period treatises on and evidenced by forge remnants at sites like those in and . These tools, often paired with anvils, enabled the production of armor, horseshoes, and structural iron, supporting the era's expanding and architecture amid feudal economies. The accelerated the sledgehammer's development in the , with steam-powered forges and hammers—exemplified by James Nasmyth's 1840 invention—facilitating precision forging and by the 1850s in Britain and America. This mechanization shifted production from artisanal workshops to factories, standardizing designs for railroads and . Post-World War II innovations, including handles introduced in the late 1940s, enhanced tool longevity and safety by resisting breakage and vibration-related injuries.

Design and Construction

Physical Components

The sledgehammer consists of several key physical components designed to facilitate powerful, controlled impacts in heavy-duty tasks. The primary elements include the head, , grip, and balance point, each contributing to the tool's effectiveness in generating and directing . The head serves as the striking element and is typically the heaviest part of the sledgehammer, weighing between 2 and 20 pounds to provide substantial upon impact. It is commonly forged from high-carbon for durability under repeated high-force strikes. The head's often features flat faces or a shape to distribute evenly across surfaces, preventing excessive localized damage or slippage during use. The connects the user to the head and is generally 2 to 4 feet in length, allowing for a full two-handed swing to maximize leverage. It is typically straight or slightly curved to enhance control and power transfer during the arc of motion. Attachment to the head occurs via an eye—a reinforced opening in the head through which the handle's end is inserted and secured with wedges—for stability. At the base of the lies the grip, which is textured or wrapped in materials like rubber or synthetic coverings to ensure a secure hold and reduce hand . This area often incorporates a metal driven into the handle's end to expand and lock the head firmly in place, preventing loosening from vibrational forces. The balance point of a sledgehammer is positioned near the head due to its disproportionate weight, which optimizes the tool for controlled swinging by concentrating at the striking end while allowing the user to guide the motion with minimal effort. This configuration enhances swing efficiency and reduces strain on the arms. Historically, handles were often made from wood such as for its natural flexibility and shock absorption.

Materials and Manufacturing

Sledgehammer heads are typically constructed from drop-forged , such as AISI 4140 chrome-molybdenum steel, which provides exceptional and shock resistance essential for withstanding repeated high-impact forces. This material is hardened to a Rockwell C scale of 50-55 through processes, ensuring durability while maintaining toughness to prevent chipping or deformation during use. Handles are traditionally made from hickory wood, valued for its natural shock absorption properties that reduce vibration transfer to the user during strikes. Modern alternatives include fiberglass-reinforced composites for enhanced longevity and resistance to , or steel cores for maximum strength in heavy-duty applications. Recent innovations as of 2023 include advanced ergonomic grips and anti-vibration technologies in composite handles to further reduce user fatigue. The begins with the head from a heated to approximately 2,200–2,350°F (1,200–1,300°C), where it is shaped under compressive force in dies to form the striking faces and eye for insertion. Following , the head undergoes , including to harden the surface and tempering at controlled temperatures (typically 400–600°C) to balance with resilience against cracking. Assembly involves inserting the into the head's eye and securing it either with wooden or metal wedges for traditional handles, or adhesives for models to ensure a vibration-dampening bond. Sledgehammers must comply with established quality standards for impact tools, such as ANSI B107.54 for heavy striking tools, which specifies design, construction, and testing requirements including head-to-handle retention under dynamic loads. Similarly, ISO 15601 outlines technical specifications for hammer heads, mandating tests for assembly integrity, hardness, and resistance to fatigue to verify safe performance in demanding environments. These standards include rigorous evaluations, such as repeated impact simulations, to confirm head retention and overall tool reliability.

Types and Variations

Standard Sledgehammer

The standard sledgehammer is a versatile striking tool characterized by its robust , consisting of a heavy metal head attached to a long handle, designed primarily for delivering powerful blows in general and tasks. The head is typically double-faced with flat striking surfaces on both sides, allowing for effective impact distribution without the need for specialized edges. Weights for standard sledgehammers generally range from 5 to 20 pounds, though models between 8 and 12 pounds are most commonly used for balanced general-purpose applications that require sufficient force without excessive fatigue. The handle, often made of wood or for and shock absorption, measures 30 to 36 inches in length to facilitate two-handed overhead swings that maximize momentum and striking power. In comparison to related tools, the standard sledgehammer is notably heavier and longer-handled than a conventional , which typically weighs 16 to 24 ounces and has a shorter handle for one-handed precision nailing, enabling the sledgehammer to generate greater force for broader impacts. It is also lighter and more versatile than a maul, which often exceeds 12 pounds with a wedge-shaped head optimized for splitting rather than flat-surface striking, providing the sledgehammer with enhanced precision in versatile applications.

Specialized Variants

Specialized variants of the sledgehammer feature modifications to the head and tailored for particular tasks, distinguishing them from the standard flat-faced design used for general heavy striking. These adaptations prioritize specific impact types, such as driving, breaking, shaping, or prying, often with altered geometries to enhance functionality while maintaining the tool's core principles of force delivery. The post maul, a heavy-duty variant for driving wooden fence posts or stakes into the ground, typically has a broad, double-faced head weighing 10 to 16 pounds to distribute force evenly and minimize damage to the post top. Its 36-inch handle provides leverage, and the construction offers superior to reduce handle splitting under repeated impacts. Drilling hammers, employed in mining and quarrying for breaking rock, have shorter handles of 12 to 18 inches and lighter heads of 2 to 6 pounds, allowing for precise, controlled swings in confined spaces. One end of the head is flat for general striking, while the opposite features a pointed or edge to fracture stone or initiate drill holes. Blacksmith's sledges incorporate a cross-peen head, with one flat striking face and a peen for directing metal during , typically weighing 2 to 4 pounds on handles up to 24 inches for balanced swinging. This design facilitates shaping and drawing out hot metal without excessive rebound. The is another specialized variant used primarily in railroad work for driving spikes into ties. It features a heavy head, typically 6 to 8 pounds, with one flat face and an opposite curved or spike end for pulling or positioning, attached to a 30- to 36-inch handle for two-handed use. Some tools combine sledgehammer-like striking faces with prying features, such as rip claws or wrecking bars with integrated ends, typically weighing 20 to 48 ounces for one-handed operation in tasks like removing nails or lifting debris. These lighter multi-functional tools emphasize versatility in breaking and separating materials over the raw power of full-sized sledges. Key differences among these variants lie in head geometries—such as flat faces for post driving, pointed ends for rock fracture, peens for metal manipulation, or beaks for spike driving—contrasting the uniform flat faces of standard sledges to optimize force application for niche impacts.

Uses and Applications

Construction and Driving Tasks

In construction, sledgehammers are commonly employed to drive stakes, posts, and piles into the ground, providing vertical force essential for securing structures during installation and foundation preparation. The technique typically involves an overhead swing, where the user maintains a firm stance with feet spread to width, gripping the near the end to maximize leverage and deliver controlled, downward blows that embed the stake or post securely into or substrate. This method ensures stability for temporary markers, barriers, or foundational elements, with the hammer's weight—often 8 pounds or more—concentrating impact to penetrate dense without requiring mechanical aids. In blacksmithing, sledgehammers facilitate and shaping of hot metal on anvils, particularly for larger workpieces where heavier strikes are needed to deform and refine material under heat. The process demands rhythmic strikes, coordinated between the smith and any assistants, to draw out, upset, or flatten the metal while it remains malleable above its recrystallization temperature, allowing precise control over the workpiece's form without excessive cooling between blows. This application leverages the tool's mass for efficient energy transfer, enabling the transformation of raw stock into tools, hardware, or structural components through repeated, timed impacts. Sledgehammers have played a key role in railroad and applications, especially for driving into ties to secure rails and for similar pounding tasks in extraction during 19th-century projects. In railroad , crews used sledgehammers—often in teams—to drive with rapid, alternating strokes, laying tracks at rates supporting thousands of miles of expansion across by the late 1800s. In operations of the era, the tool drove wedges or supports into rock faces and broke loosened material, aiding manual tunneling and ventilation in lead, , and districts before dominated. The efficiency of a sledgehammer in these tasks stems from the leverage provided by its length, typically 14 to 36 inches, which allows the user to generate impact forces several times greater than their body weight alone by accelerating the head through a full swing arc. This amplifies the effective striking power, enabling penetration of resistant materials with fewer efforts compared to lighter hand tools.

Demolition and Breaking

In demolition tasks, sledgehammers are employed to fracture and remove rigid materials such as concrete, masonry, and rock by delivering high-impact blows that initiate and propagate cracks. Operators typically begin strikes at existing edges, joints, or weak points to encourage crack propagation along natural fault lines, reducing the energy required for subsequent breaks and minimizing uncontrolled shattering. For concrete slabs up to 4 inches thick, a 6- to 8-pound sledgehammer allows targeted swings that create initial fissures, after which a pry bar can be used to lift and separate fragments, ensuring efficient material removal without excessive rebound. Similarly, when breaking masonry walls or rock formations, the technique involves repeated perpendicular impacts starting from the periphery to exploit tensile weaknesses, often pairing the sledgehammer with a cold chisel for precision scoring before full-force delivery. For interior demolition, sledgehammers facilitate the removal of non-load-bearing walls, partitions, and floor or wall tiles by systematically dismantling structural elements while avoiding uncontrolled scatter. In wall demolition, strikes are directed at the ends of wooden studs or mortar joints in to cleanly sever components, preventing vibration absorption that could dull the impact or cause structural flexing. When removing tiles, a flat-faced sledgehammer head is swung at a shallow angle to dislodge bonds without excessive , often following initial scoring with a or to control the path and limit flying fragments. These methods are particularly effective in confined spaces, where lighter 4- to 6-pound models enable precise control over swing trajectory to target specific areas like or underlayment. In industrial settings such as salvage yards, heavy-head sledgehammers—typically 10- to 20-pound models with reinforced handles—are utilized for dismantling large machinery, , and metal frameworks by shattering welds, bolts, and casings. These tools excel in breaking down oversized components like engine blocks or chassis frames, where the added mass amplifies destructive force for rapid disassembly prior to scrap processing, often in conjunction with hydraulic shears for hybrid efficiency. The emphasis on heavy heads ensures penetration through tough alloys without handle fatigue, making them indispensable for high-volume salvage operations. The effectiveness of a sledgehammer in these applications stems from its impact , which is proportional to the of the head times the square of its upon striking, emphasizing the importance of technique to maximize destructive potential. To achieve optimal shatter, operators employ a wide swing arc—typically 180 degrees from shoulder height—while maintaining a stance with bent knees and elbows at 90 degrees, allowing and arm extension to build peak of 10-15 m/s for a standard swing. This arc optimizes energy transfer to the target, fracturing brittle materials more efficiently than shorter, underpowered motions, though actual is precisely given by 12mv2\frac{1}{2} m v^2, where mm is the head and vv is impact speed.

Safety and Handling

Ergonomic Considerations

Ergonomic considerations in sledgehammer design focus on features that enhance user comfort and efficiency while mitigating physical strain during prolonged operation. Handle designs commonly incorporate anti- materials, such as rubber or cushioned grips, to dampen shock and reduce hand-arm vibration transmission, thereby minimizing from repeated impacts. These elements help maintain grip control and lessen musculoskeletal stress on the wrists and forearms. Weight distribution plays a critical role in preventing back strain, with balanced head-to-handle ratios ensuring the tool swings naturally without excessive on the spine. Handle lengths are selected to match user stature for optimal posture, providing sufficient leverage while allowing the arms to extend comfortably without overreaching or hunching. This sizing promotes a neutral body position, reducing the risk of awkward postures that could lead to lower back discomfort. Effective sledgehammer use emphasizes proper stance and posture to harness power efficiently while protecting the spine. Operators should adopt a two-handed grip, with the non-dominant hand near the end of the handle for control and the dominant hand closer to the head for guidance, while positioning feet shoulder-width apart in a stable stance—often diagonal for better balance. Incorporating hip rotation during the swing generates force from the lower body, distributing load away from the upper back and shoulders to avoid spinal stress. Modern innovations, such as shock-absorbing inserts embedded in handles, further advance ergonomic performance by isolating vibrations at the point of impact. These inserts, often using or rubber composites, significantly reduce transmitted forces to the user's arms and improving endurance during extended tasks.

Potential Hazards

Using a sledgehammer poses significant risks of physical , primarily from rebound strikes and flying . Rebound strikes occur when the hammer bounces back upon impact with hard surfaces, potentially causing fractures or other traumatic to the user or bystanders if control is lost. For instance, a documented case involved a worker sustaining a injury from a rebounding hammer strike while removing a pin. Flying , such as chipped particles from the target material, can lead to severe eye trauma or facial lacerations. To mitigate these hazards, (PPE) including safety goggles, face shields, and thick gloves is essential, as recommended by OSHA for protection against flying particles and rebound impacts. Overexertion represents another key risk, particularly repetitive strain injuries (RSI) affecting the shoulders, wrists, and due to the tool's weight and the force required for repeated swings. Studies indicate that repetitive hammer use can reduce forearm extensor muscle strain when using shock-absorbing handles, but prolonged exposure without breaks still leads to musculoskeletal disorders. In , struck-by incidents involving tools contribute significantly to nonfatal injuries. Mitigation involves selecting appropriately weighted tools, taking regular breaks, and incorporating ergonomic posture aids to distribute force more evenly across the body. Environmental factors can exacerbate sledgehammer hazards, such as use near overhead electrical lines, which increases the risk of if the tool contacts energized wires during a swing. In confined spaces, uneven footing or obstructions heighten the chance of slips, trips, or loss of balance, potentially leading to falls or uncontrolled strikes. OSHA guidelines emphasize maintaining safe distances from power lines—at least for tools up to 50 kV—and ensuring clear, stable work areas to prevent these incidents. Improper maintenance, particularly loose hammer heads, can result in catastrophic misstrikes or detachment during use, causing impact injuries. A major recall of over 2.2 million fiberglass sledgehammers by Stanley Black & Decker cited premature head loosening as a hazard, with 192 reports of detachment and two injuries to users' faces and heads. To address this, regular inspections are critical, including daily checks of wedges on wooden-handled models to ensure secure attachment and immediate replacement of any cracked or worn components.

Cultural and Symbolic References

In film and television, sledgehammers frequently symbolize raw violence and psychological terror. The 1983 shot-on-video Sledgehammer features a spectral killer wielding the tool to brutally murder teenagers in an isolated house, establishing it as a low-budget slasher icon. Similarly, in the 1990 adaptation of Stephen King's Misery, nurse employs a sledgehammer to shatter author Paul Sheldon's ankles in the notorious "hobbling" scene, embodying obsessive control and sadism. In music and literature, the sledgehammer serves as a potent metaphor for overwhelming force. Peter Gabriel's 1986 hit single "Sledgehammer," from his album So, uses the implement as a phallic symbol of intense, unyielding romantic pursuit, with lyrics evoking sexual energy and determination. In King's 1987 novel Misery, an axe is used in the hobbling scene to amputate Paul Sheldon's foot, inflicting irreversible damage and underscoring themes of captivity and revenge; this amputation and cauterization are more graphic than the film's sledgehammer version. Video games often portray sledgehammers as versatile tools for destruction and utility. In The Legend of Zelda: Breath of the Wild (2017), the Iron Sledgehammer is a Goron-forged two-handed weapon that excels at smashing ore deposits and delivering heavy blows to enemies, highlighting its dual role in exploration and combat. Modded versions of Minecraft introduce sledgehammers as powerful mining instruments capable of breaking blocks in wide areas, extending the game's crafting mechanics with brute-force efficiency. Symbolically, sledgehammers in cartoons and comics represent unbridled power and excess. Mike Mignola's Sledgehammer 44 series (2013), published by , depicts a 1944 iron-armored protagonist battling Nazis with , using the sledgehammer motif to evoke WWII-era heroism and mechanical might. In broader cartoon illustrations, the tool embodies overkill, as in depictions of "using a sledgehammer to crack a nut," satirizing disproportionate responses to minor problems.

Idioms and Metaphors

The idiom "a sledgehammer to crack a nut," denoting the use of excessive force or resources to address a minor issue, emerged in mid-19th-century American English, drawing from the impracticality of employing a heavy tool for a delicate task like shelling nuts. This expression highlights disproportion in effort, often critiquing inefficient problem-solving. Similarly, phrases like "hit with a sledgehammer" serve as similes for sudden, overwhelming impact or surprise, evoking the tool's forceful strike, with roots in 19th-century descriptive language for intense physical or emotional blows. In metaphorical contexts, the sledgehammer symbolizes heavy-handed tactics lacking nuance, particularly in and . The "sledgehammer approach" refers to crude, ruthless methods that prioritize blunt force over subtlety, as seen in critiques of policies like pandemic measures. This usage contrasts with more precise strategies, emphasizing the tool's association with demolition over . By the mid-20th century, such metaphors had solidified, evolving from the sledgehammer's literal role in 19th-century industrial labor—where it represented raw in and —to an abstract emblem of overkill in modern . In , it can denote unsubtle criticism that delivers harsh, unrelenting judgment without tact. In sports, the term evokes powerful, decisive actions, such as descriptions of forceful strikes in that feel like a "sledgehammer hit" or heavy in hockey, mirroring the tool's impact in athletic training routines like pounding.

References

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  63. https://physics.info/energy-kinetic/practice.shtml
  64. https://melsafetyinstitute.org/wp-content/uploads/2023/07/MSI-Shift-Briefing-Sledgehammer-Best-Practices.pdf
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  66. https://www.imca-int.com/resources/safety/safety-flashes/1321-leg-injury-when-struck-by-rebounding-hammer/
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  73. https://www.songfacts.com/facts/peter-gabriel/sledgehammer
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  81. https://www.wcvb.com/article/red-sox-fan-hit-by-broken-bat-at-fenway-park-speaks-out/8235003
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