This is not really a glitch, but is fun to do. To do this get a second controller and put in this code.... Hold L1, and then type in UP, UP, while holding L1. Do this cheat a few times. Then hold L1 and press UP, DOWN, UP, DOWN while holding L1. NOTE: ONLY DO THIS CHEAT ONCE. Now to kick this off!!! Once you put in the two cheats, go to the boys' dorm. Then press L2 AND R2 to select your marbles. When you have the marbles ready, then trow them in front of the exit. After you do that QUICKLY pull the fire alarm. Then QUICKLY hide in the garbage can by the exit. AND WATCH THE FUN!!! Sometimes people will fight each other when you do this. I have seen it happen.