I've been fooling around with custom gametypes in ways it never was intended. For an example, set the weapon damage to instant kill with no shields and 10% damage resistance. Set up a shield door room with a soccer ball in it and get hit by it. Then punch a wall, or gravity hammer something, or kill a guy with a charged plasma pistol. You somehow kill yourself. Or setting up gravity to 50%, custom powerup gravity of 200%, levitate the powerup high up enough for a 50% jump, and set it to instant respawn. That's sorta amusing. 300% speed and no shields with 0% damage resistance, then running into another player running at you will kill each of you if done correctly. There's a 'hacked' gametype floating around B.Net that sets the respawn time to nothing. You'll have to find it yourself though. Anyone got anything else?