Australian Indoor-Rules Quidditch
Vaguely - very vaguely - related to Quidditch in the Harry Potter context, Australian Indoor-Rules Quidditch is the invention of the gentlemen at the fine webcomic Mac Hall and their friends. Specifically, it's the intellectual property of Phil Moore and Justin Huneycutt. Like many of the fictitious sports already documented, it's a little on the rough side.
Australian Indoor-rules Quiddich is played with a dark hallway and a hard rubber ball of the super-bouncy-ball style. The best kind is a rubber ball with a solid core and an LED in the center that lights up on impact. Sometimes they give them away at trade shows or conventions as a promotional freebie. The hallway should be as close to pitch black as you can get it.
- Throw the ball at each other as hard as you can.
That's it. You are free to defend yourself in any way that doesn't make you look like a complete tosser. Use of bats is not encouraged, but they're often used for defense as a house rule. No score is kept. Play continues until it stops or until someone wins.