It's nearing the end of the school year, and my roommate and our buddies have been pulling pranks on each other. Two of them took my roommate's matress and placed it under the other roommates matress. My roommate didn't want to wake him up because he had a final in the morning (the kid sleeping.) My roommate hasn't moved the matress back yet, and has been forced to sleep on the couch for the past couple of nights. Today I changed my buddy's away message and he had no idea who did it, so I told him my roommate did it. After dinner he pour water onto him as he was sleeping on the couch. During dinner I went back to get some more food, and the two guys pour their pop and a packet of mustard into my glass. I didn't even notice it until I finish the glass. Later on, my roommate was drinking a mudslide and left to make a phone call. I proceeded to pour some raspberry vinegar into his drink. The problem with that was it solidify and he upset that I wasted his booze. Then my other buddy said someone stuck a tack under his sheet and is convince that I placed it there (I didn't, I swear.) Now these three guys swear that they are going to get me really good. Does anyone have any good prank ideas I can get these guys with? P.S. I covered my roommate's toothbrush head with dish washing liquid, but he hasn't brushed his teeth yet.