I've seen it played but never got all the rules. Say four people are sitting in the stands at a baseball game...

The rules go something like this: I think everyone adds one dollar to the pot before the game starts. If a hitter reaches base, the first player gets to take a dollar from the pot. if the next player is called out, then player two would add a dollar to the pot. if the next hitter hits a home run, the third player would get all the money.

It's a simple game. I'm sure there are more rules to the game than what I've written above. Does anyone know if it has a name?
Steve L, thanks for the response. It helped me find the game (which is much more complicated than the way you play):

http://thehatgame.blogspot.com/2007_03_01_archive.html