[url=http://www.9news.com/storyfull-9wtk.asp?id=1454]Sometimes truth is stranger than fiction[/url].

-kill-9

Ha, we used to play a game called butt ball in college.  The idea was that you would throw a tennis ball against the garage door and catch it.  The game went on until someone bobbled and dropped the ball or failed to hit the garage with their throw.  If you were that person you had to kneel down in front of the garage as each person who successfully caught a ball through that turn threw the ball at your ass. I had a friend who could throw in the low 80s.  Hurt like hell.  For some reason I remember the game being a lot of fun. [:P]

We played a similar game, and called it "Butts up."  
Had to hit the garage door/wall in the air.  If the wall wasn't hit in the air (was hit on the bounce), or if a player bobbled the ball and dropped it, then they had to run up, and touch the wall before someone else hit it with a thrown ball.  If the bobbling player managed to beat the throw to the wall, the game continued; but if the ball beat them to the touch, then, yes, the player who committed the foul had to bend over and each of the other players got to take a shot at his rear.  No flinching, of course.  

IMHO- That's the game.  Sorry, it's been a few years since I've played it.  It was great stupid fun.

Never played that one...