- Smoke jimson weed. Do whatever comes naturally.
- Switch the sheets on your beds while s/he is at class.
- Twitch a lot.
- Pretend to talk while pretending to be asleep.
- Steal a fishtank. Fill it with beer and dump sardines in it. Talk to them.
- Become a subgenius.
- Inject his/her twinkies with a mixture of Dexatrim and MSG.
- Learn to levitate. While your roommate is looking away, float up out of your seat.
When s/he turns to look, fall back down and grin....
- Speak in tongues.
- Move you roommate's personal effects around. Start subtlety.
Gradually work up to big things, and eventually glue everything s/he owns to the ceiling....