I know. We live in a world where the scare tactic is used for everything.
But I have never heard anything so ridiculous as being afraid to shoot a 22 rimfire straight up, because it might come down and hit you!
The odds would be something like one in several milion that you could drop a 22 bullet on yourself, and if you did, it would be about the same sensation as being bit by a fly. No, probably not that bad.
Go out with a boat on a glassy lake with a 22 and a box of shells. I will bet you can't drop one bullet close enough to you, to be visible when it hits the glassy water, with your fifty trys!
Years ago the US military wanted to see how long a 30-06 bullet stayed in the air. They went out to a platform on on a hight tide flood area and set up. They used scientific leveling defices and calculated any upper air wind speeds. After about three days of trying such things, and never getting one bullet to hit the water where they could see it, they gave up and went to a machine gun! With the machine gun they had success.
They also determined the damage a bullet may due on returning to the earth. They concluded that a 700 grain bullet from a 50 calibre gun could be lethal.
A normal, heavier hat, would protect a person from injury from the 150 grain fmj 30-06 bullet from a 30-06.
You people who are afraid to shoot a 22 in the air, how could you possibly stand the dangers of getting out of bed and driving to where you shoot?