Board Thread:Fun and Games/@comment-25012056-20141025153920/@comment-26116279-20150226132810

yes but how high up is a shard of rock going to fall from in a mine, mine roofs are probably 10-15  feet high usually, and they are usually small pieces of rock thrown from explosions when they are mining with explosives. you can throw a rock with much more force than it would get from falling from the ceiling of a mine half a mile underground. Besides hard hats are somewhat cussioned to help prevent concussions because they are specifically made for those purposes.