Howard Sheppard, 30, of Deltona, FL, was shot in the left arm. How?
He picked up six rounds of ammunition and one of them discharged and struck him in the arm! No, wait. That's not true. What really happened was this: the ammunition was on a shelf and one of the bullets may have discharged because he threw a hammer and a string trimmer on the shelf. No, wait. that's not true either. What actually happened is this: he put the bullet in a vise clamp, put a metal punch on the primer and hit it with a hammer.
Yep, that'll do it.
We used to throw them at a the side of an old stone bridge. Very exciting, though we definitely lost more than we got to go off. And it's much safer than hitting them with a hammer, since there's a lot less chance they'll hit you if they do go off. Not very smart, true, but we were 11.
You'd think it wouldn't be hard to be smarter than a 5th grader - when it comes to bullets at least. But you'd be wrong!

Having no access to bullets, we used to put coins on the railway track, wait for a train to pass and then hunt for the flattened results.
The kid across the street taught me to throw .22 long rifle cartridges down on the street, primer first, to see if we could get them to go off. A few did.
Amazing that any babies born with testicles survive to their majority.
Dude, we used to throw 9 mm rounds in a bonfire. Whizz! Whizz!
Darwin award.