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Can a penny dropped from a skyscraper kill a person?

NoParrot Fact Check · July 24, 2026

Fact-checked by NoParrot's 4-model methodology · Last verified July 24, 2026

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38

NoParrot Score

Mixed signals

Claim breakdown

Verified
1
Uncertain
2
Disputed
0

Synthesis

In contrast to a penny, a heavier, more aerodynamic object dropped from a similar height can be dangerous. Such objects achieve higher terminal velocities and possess greater kinetic energy, posing a significant risk of severe injury or fatality.

No, a penny dropped from a skyscraper cannot kill a person. This is because a penny is light, weighing about 2.5 grams, and its flat shape causes it to tumble as it falls. These characteristics significantly limit its terminal velocity, preventing it from gathering enough kinetic energy to be lethal.

Experiments, such as those conducted by MythBusters, demonstrated that a penny fired at its terminal velocity against a test dummy and a real person caused only minor discomfort. The penny's harmlessness is specifically due to its shape and low mass, which prevent it from causing serious injury or penetrating the skull.

What each model said

  • Grok ✓ All verified
    No. A penny dropped from a skyscraper reaches terminal velocity of roughly 30–50 mph due to its low mass and high drag, which is insufficient to cause serious injury or death. Heavier objects could be lethal, but a penny is not.
  • Gemini ✗ 1
    No, a penny dropped from a skyscraper cannot kill a person. Due to its light weight and flat shape, a falling penny has a low terminal velocity of only about 30 to 50 miles per hour (48 to 80 km/h). Air resistance prevents it from accelerating any faster, regardless of how high the building is. At this speed, the penny lacks the mass and kinetic energy to penetrate a human skull or cause fatal injuries; it would feel like being flicked in the forehead and might cause a minor bruise.
  • GPT ✓ 2 ⚠ 1
    No. A penny dropped from a skyscraper is very unlikely to kill a person. A penny is light and tumbles as it falls, so air resistance limits its speed to a relatively low terminal velocity—roughly around 25–65 mph depending on orientation and conditions. At that speed, it could sting, bruise, or possibly cause a small cut, but it does not have enough energy to penetrate the skull or be lethal. A heavier, more aerodynamic object—like a bolt, tool, or piece of metal—dropped from a height can be dangerous or deadly. A penny is not.
  • Claude ✓ 2 ⚠ 3 ✗ 1
    No. A penny dropped from a skyscraper cannot kill a person—this is a myth. **Why:** - **Terminal velocity is low.** A penny is flat, light (about 2.5 grams), and tumbles as it falls. Air resistance limits its terminal velocity to roughly 30–50 mph (50–80 km/h). It doesn't fall faster the higher it starts once it hits terminal velocity. - **Not enough force.** At that speed, a penny carries relatively little kinetic energy. It would sting or cause a minor bruise or small cut at most, but it lacks the mass and velocity to penetrate the skull or cause fatal injury. This was tested on *MythBusters…

Models Used

  • Grok
  • Gemini
  • GPT
  • Claude

Disclaimer: This page summarizes the output of 4 frontier large-language models at a single point in time. NoParrot Score reflects cross-model consensus, not absolute truth. Models can be wrong, and consensus can be wrong with them. Treat this page as a research aid, not a final verdict.

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