35-ish years ago I was in the process of putting away my guns and gear and had already double confirmed my Ruger 10/22 was fully unloaded.
At that point my friend reminded me we haven't shot any CCI Stingers yet,
and we had planned to test a Stinger round (advertised muzzle velocity of 1600 ft./s !) by shooting an aluminum drink can full of creek water.
So I loaded three CCI stingers in the gun while my buddy searched for some empty cans along the creek bank.
He found one, and we filled it up and set it on a mound of dirt on the bank of the creek.
I put the magazine in, stepped back about 15 yards, chambered the round,
took aim, and popped that can dead center.
It split wide open and made an impressive geyser of water.
Then, heat took the dripping Ken back to our vehicle for garbage disposal well I walked back to the trunk to put the rifle away I drop the magazine from it and totally forgetting about the round in the chamber because I'd forgotten that I had loaded three rounds but only fired one.
I pointed the rifle barrel just a few feet away from my own feet towards the ground and I pulled the trigger, expecting to hear a "click."
Right at that moment my friend, who had tossed the shredded can on the floorboard of the passenger side of the car, had walked back towards me by the trunk.
My rifle fired and put a bullet in the sandy soil about 2 ft. in front of his toes.
Meh, it was a .22WMR.... Anything less than a .40S&W isn't really all that lethal... just ask anyone... ;-)