My first recollection of the harm a dropped object can cause was in my youth when touring the Empire State Building in New York City. I remember over-hearing, “If you drop a penny or pen from the Empire State Building and it lands on someone, it could kill them.” You may have heard this anecdote too.
For some reason, that stuck with me — how something so small, like a penny or ballpoint pen, could turn into a dangerous weapon when dropped from a height.