The Ultimate List of Practical Jokes

One joke that we did in residence was the Chinese Fire Drill I don't quite know why it is called that. Anyway..
The victim is on the pot in the dorm washroom. Everyone grabs a bucket (we used the waste baskets from our rooms) and fills the buckets with water. Take a paper bag and set it on fire, toss it under the door into the stall. Yell fire as everyone tosses the water into the stall. Needless to say the fire as well as the victim get very wet.

This one fellow in the house was hit a number of times and took to relieving himself in other locals. We followed him a couple of times and nailed him in many parts of the residence.
Later of course we conspired with our victim to get back at the original instigator of the drill. The guy in the stall had a bucket of water, and when the the instigator tossed the bag in we all hit him.
It is common for draftsmen to sprinkle SCUMEX (powdered rubber eraser) on tracings prior to doing any drawing on it. This reduces smearing of the pencil marks and such and results in a cleaner tracing.
At a former employers we had replaced the Scumex at one draftsmans desk with dried parmesian cheese. It looked about the same. It was extremely interesting watching him draw for a while and then begin to smell the paper. Took the poor dude almost 10 minutes to guess that he had been gigged!
I just pulled one on somebody -- I slipped some of those anti-shoplifting strips into the lining of the victim's favorite jacket. I was set to pull another one, but didn't get the chance - to cut out a silhouette of a gun from metal and hide it in a piece of carry-on luggage.
Two teachers at my high school started a practical joke war that culminated in a junk mail war of huge proportions. They finally called a truce and got it cleared up and the mail stopped, except for the military mail that one had signed the other one up
for. He wrote (honestly) that he had graduated from a fine college and was interested in the Marines, Air Force, etc. etc.
When I left, about two years after this, he was still getting phone calls from 2-4 times a month.... they were very persistant even over he (loud) objections that he was 45 and not interested in a career change...
New secretary (second day on the job) answers telephone as is told in official tones: "This is the phone company. We are testing a new circuit wiring scheme in your offices. Please keep everyone off the phones for the next 10 minutes. We will be verifying the correct wiring of your system by passing hot steam through the wires. Instruct your employees to place their phones on the floor, or, better yet, wrap them
in towels to avoid scalding themselves. We will advise you when the tests are complete click." After momentary panic, the secretary begins a frenzied "Paul Revere" routine, running from desk to desk while glancing frequently at her watch. Just as the 10 minutes are about up, she bursts into her boss's office (while he is in the midst of an important long-distance call) and, screaming, grabs the receiver from his hand and flings the whole phone under his desk...
Tell someone you can pin a glass of water to the wall -- a real glass, not a paper cup, using an ordinary straight pin. Naturally they won't believe, so you set out to prove it.
Get a glass of water and a pin. Hold the glass up to the wall and start to pin it up. And then drop the pin. You've got the glass in position just right, so you ask your victim real nice to get the pin for you. When they bend down to pick it up, dump the water on their head.
This works especially well when there's a crowd of people watching. It can also be very dangerous for the joker, so be careful if you try it.
one time in my undergrad days, it was snowing like mad out. someone decided it was time a make a snowball. then someone else suggested that we should put this snowball in this one guy's room-- nobody liked this guy-- so when the word got around, half the people in our dorm section came out and help! we got this sucker so BIG that it must be at least 4 feet in diameter. it took about 6 person to haul the darn thing up 3 flights of stairs. we got the snowball into this guy's room while he was out, turn off the heat in the room and left all the windows open, so the snowball won't melt too fast. well... the turkey came back 3 hours later and found a HUGH snowball sitting in the middle of his room, and started melting! I still have the picture of the snowball. (if you really wonder how big the snowball is, just imagine a snowball the size of a normal dinning room chair!)