We used to have a game at my old highschool which was called crazy eyes. Once you join, you're in, unless you quit, you can't join again. So basically whenever you see someone who is playing the game you'll put your hands upside down on your eyes making goggles and if the person playing looks at you without putting their hand sideways across their nose they have to lay down on the floor no matter what they're doing. Talking to a teacher, eating lunch, taking a piss (i guess). Kinda fun because you embarrass yourself.