Newspaper To The Ceiling
Fill your buddy's dorm room with crumpled up newspaper...fill it all the way to the ceiling if you can!

Fire!
While one of your roommates is taking a dump in the restroom, light a napkin on fire and toss it in the restroom from the window and yell FIRE!!! Then, seconds later you and a couple of your buddies toss gallons of water from big buckets all over the napkin and your victim!

Perfect Prank For A Snow Day
Roll a snowball up as big as you can make it. 3 feet or 4 feet tall is perfect. Then get a couple friends to help you set it down in your roommate's room while he is area.

Metal Gun Prank
Next time your roommate is leaving back home to visit for the holidays place a metal object that is the shape of a gun inside of his luggage. If you know how to use machines in shop class, this should only take a few minutes with some scrap metal.

Ever Seen A Match Burn Twice?
Ask your roommate if he has ever seen a match burn twice. He will say no. Then you show him how it can be done. Simply strike it up to show him the first burn. Then when it goes out and while its still hot, quickly place it on his skin. After he says, "Ouch!" Tell him that is the 2nd burn.

Classic Cold Water Prank
While your roommate is taking a nice warm shower dump a bucket of ice cold water over the top of the shower curtains.

Curtain Removal
Wait until your victim is in the shower. Take down the curtain that is in his room. Then go outside and draw a crowd of passer by's. Tell them to keep an eye on what is going to appear in the window.

Room Key Swap
If you know other students in the same dorm building as you that just leave their door keys laying around then this is the perfect prank. While they are away, take their keys off each others key rings and swap them.

How Does It End?
Tear out the last 2 pages of the current book your roommate is reading. Then leave a note in the pages place. Send your victim on a scavenger hunt to find the pages.

Spotless
If you know someone who has a very messy dorm, this is a great prank. While he or she is away sneak into the dorm and clean it. Make it spotless. In cases of extremely messy rooms you may need a couple of friends to help you out.