Even without in depth firearms safety training, I would think that it would be easy to understand that if you don't check the gun about 1 second before, there's a chance it could be hot... and even if you did just check, you should check AGAIN to make sure that you didn't just chamber a round by checking.... so check 1, 2, 3 times... just to be sure. I guess I'm just a worry-wart... but I've had a close call with touching off a round I didn't want to... (never touched it off, but was JUST about to do some dry fire practice and decided to check my "empty" pistol one more time.. and bingo.. out popped a chambered rd.) so now I'm extra, EXTRA careful.
I just don't understand why ANYONE would think that it's funny to point a real gun at someone's head and pull the trigger...