"what if we just dropped rocks on our enemies"
"yes, but how do we turn that in to a billion dollar defense contract?"
"what if we just dropped rocks on our enemies"
"yes, but how do we turn that in to a billion dollar defense contract?"
actually a falling human body only reaches about 120 mph before it can't go any faster due to air resistance - this is called terminal velocity.
you actually need engineering to make something that weighs 20 grams go fast enough to be lethal when dropped from a plane.