play stupid games, win stupid prizes
A warning that dictates that intentionally doing something agreed to be foolish or stupid will only result in negative consequences for the person doing the idiotic thing.
Jack apparently looked down the barrel of his pistol to see why it wasn't firing. It seems he didn't remember the maxim of "play stupid games, win stupid prizes" and blew his brains out on accident.
play stupid games, win stupid prizes
When the consequence of a dumb action was entirely forseeable and results in dumb consequences.
A man raped a horse then the horse kicked him to death."
"*shrug* You play stupid games, win stupid prizes."
"*shrug* You play stupid games, win stupid prizes."