I am a constant practical joker and my roommate and I are constanly trying to outdo each other. Here is what I did last night that left me giggling myself to sleep.....  
 
I took a pair of underwear, squirted them liberally with HP Sauce, then smeared a bunch on the toilet seat and left the underwear laying by the toilet....... about 45 minutes later I hear a SCREAM to end all screams and then gagging and gagging and swearing at me.  
 
What practical jokes have you played that were laugh worthy??  
 
 

... keep life interesting to say the least. I'm still laughing.

My brother bought his co-worker a slurpee and just before he gave it to him, he put hot sauce in the straw.  
 
This was in retaliation to the one done to him...  
Somehow my brother's co-worker put a gold fish in his bottled water and my brother didn't notice until the gold fish was half in his mouth!!

Squirted water into a co-worker's car locks one cold winter night while he was at work.  
Wait a minute, that was more like revenge.

As long as the rules are followed, practical jokes can break the tension of many situations.  
 
1. Can not cause permanent damage. If anything has to be repaired, the joker should offer. i.e., helping to thaw the frozen car lock.  
 
2. Do not plan when drunk. If planned when drunk, review when sober before attempting. Double check for possible safety hazards. Becoming blind or deaf is not a joke.  
 
3. Joking your children is okay if it is in their best interests.  
 
 
I got married on April 1 so does that count as a joke?  
 
 

Took my buddy on a quad ride, I knew the area well he didn't, Ended up taking him to a "lagoon" Where he thought it was mud and he flew right in there and kept waving me on I said no and when he thought something was up he got stuck in it. Ha I just kept laughing from the enbankment as he was trying to get out, "Poo" flying everywhere and all over him until he got out.  
 
I later told him what it was, it was quite the ordeal after that.

liquid gels, if you take off your shower head at least on ours you can fit a couple in there and when the warm water hit them they disovle and give who ever you want a nice blueish shower haha. Or heard of this, never done it tho...wouldnt want to deal with the mess haha, take some saran wrap and make sure its tight around the toilet bowl so it seems transparent and who ever goes gets some nice splash back but id think you would have had to got pranked pretty hard to try that on your enemy haha

goint to parties and putting orgael around the rims of peoples drinking glasses. Wait till they have had one or two. As they are drinking, their lips will start to go numb, as they pretend nothing is happening. Meanwhile, they have dribbled all down the front of themselves and are really not sure what is going on.

Put a minced garlic clove in the shower head. Nothing like squeaky garlic clean!

Glad I don't know some of you people........you are down right scary. Lol  
Just buy a fart machine online....like the proverbial whoopy cushion...but way funnier.

Fill sugar jar with salt then when they add it to there coffe and drink it it not good lol

put vaseline on the inside of the phone at work. They have to hold the phone there until they are done talking to maintain their professionalism while you get to kill yourself laughing from afar!

The Annoy-A-Tron is the best. So much better than the fart machine.  
http://www.thinkgeek.com/product/8c52/  

I'm glad I don't know any of you either. If someone pulled the type of jokes like above on me, that'd be the last joke you ever played. I'm pretty laid back, but you just don't make a mess or f with my stuff..lol. Seriously.  
 
I'm ok with a "boo" scare you type of joke. My son had friends over and they were looking for paranormal activity. I was changing fresh towels, they didn't hear me and I stepped out. Hilarious!  
 
Or even move machinery or an old vehicle to a different position in the field. Something benign.

I have a coonskin type hat only it's actually made out of skunk skin. Looks just like a skunk sitting there. I taped it over a remote controlled car and put some tape on the tail to the antennea so it was straight up in the air. A co-worker was on his way out to get the mail and when I heard him open the door I hit the remote full throttle and the "skunk" ran up the wheelchair ramp right at him. He screamed like an 8 yr old girl and ran back inside slamming the door behind him. We killed ourselves laughing over that one. (actually retaliation for him taking my driver's seat out of my car and putting it in my office and my office chair in my car...LOL!!!)

We bought buddy an iced Capp and brought it to his work. When he ran to the back we put ink on the end of the straw. As he was drinking it, the ink spread to half of his mouth. My friend an I were laughing so hard lmfao. It kept spreading too lol. We finally told him haha. I still laugh til I cry when I talk about it hahaha. They said the video surveillance of it was hilarious. I fell down I was laughing so hard Hahahahahahahahaha  
 

Crossing fingers...vaseline....love it...lmao  
Dr. Who...annoyathon ? Hahahahahahaha  
Still glad I don't work with you guys...you'd drive me nuts.  
You could stick the ear part of a receiver of the phone in an ink pad & watch your coworker run around with a black ear... or just scotch tape everything down on their desk.

The best (and harmless)  
 
Many years ago I was hanging out with a couple of friends of mine who are both quite a bit larger than me. All three of us were sitting in the front of a Ford Ranger which weas a very tight fit for the three of us! I sat by the passenger door as I didn't want to get stuck in between them... this led to my formulating the joke:  
 
As we drove through downtown in heavy traffic from 11th to 6th, I ducked down behind the dash pretending I dropped some money on the floor.  
 
 
 
 
Think about it!!!  
 
I couldn't stop laughing...  
 
Edited by ChrisV, 2012-08-16 18:03:06

My boss is afraid of spiders, so I found one of those BIG halaween ones at shoppers and left it in her office, door shut, just before I left for the night.  
I didn't witness the event, but the people working at the time nearly wet themselves. I felt kinda bad though LOL.  
 
Another one someone pulled on me a few years back (revenge ) was they wet my hat and put it in the freezer. LOL.

We wired a buddies break peadle to his horn. We left the wires not connected till his car was in a parking lot then connected them and just sat back and watched. Every time his foot went on the break his horn would go off.

Heard that, after one night of partying, first guy passed out lying on the couch. Other fellas stripped him down naked and tied his boot around his, ahem, sergeant Johnson.  
 
So, they roused him awake - he finds the boot on his chest (weird, eh?) then decides to throw it off him.....

cotr said "We wired a buddies break peadle to his horn. We left the wires not connected till his car was in a parking lot then connected them and just sat back and watched. Every time his foot went on the break his horn would go off. "

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thanks for the idea...  

when our boys played hockey we invited the players and their families to our home after a game. I had a 40 gallon fish tank with my pond goldfish in the living room. Before the party I made some orange jello (firmer than normal) and hid it behind the tank. When some of the mothers were watching the fish I pretended to grab one with my right hand while I had the jello in my left. The imaginary fish I caught was slipping out of my hand so had to use both, and glup ... I swallowed the jello. I thought one of the mothers was going to faint and I had a hard time explaining the orange thing I swallowed was not really a fish.

In the blow dryer!

Put a piece of scotch tape over the ear piece on a co-worker's phone, and then sit back and smile to yourself as you hear their voice get louder and louder because they start yelling into the phone receiver, assuming the other person can't hear them either

I really hope I never work with any of you! haha!

I used to work at a auto parts store, and we had this plastic display battery that was hollow, whereas the real battery was very heavy. I'd be walking towards someone with the plastic version and pretend to trip, throwing it at them!!!  
 
Another one that was really funny but not really a practical joke - I was out with a buddy that was buying a present for his gf. I can't remember what store we were in, but it was a chick store. He was getting her a robe and slippers. At the counter the cashier says "are these for you girlfriend?". Before he could answer I pipe up in my best stereotypical gay man tone "no silly they're for me!".

A couple years ago I played a good one on my wife. She had gone to sleep so I snuck over to her clock and moved it ahead one hour. Her alarm went off in the morning and when she got up to have a shower and get ready for work I switched it back to the right time. I heard her come back into the room and under her breath I heard her say "what the hell". She crawled back into bed all confused and wondering why she was up an hour early and why her alarm clock went off. I couldn't stand it anymore and broke out laughing and told her. She has been trying to get me back ever since.

had my equipment with me, included was a smoke machine. a few of us where sitting around in the livingroom, while my roomate (bedroom off the livingroom) had gone to bed. i set up my smoke machine until it was ready, very carefully opened his door and slide it on the floor into his room, and closed the door. on the outside of the room, i had the controls, and hit the button. waited about 10secs and yelled out FIRE!!!! poor guy ran out into the livingroom wearing just his tighty whities, the look on his face was priceless, we all had a great laugh on him.

We would crazy glue a loonie on the cement at the Winter fair and watch people bend over to pick it up. Before loonies we would take string and tie it to a dollar bill bury the string under the sand and as people reached down pull the bill away. Eventually kids would figure it out and jump on the string and then grab the dollar and run or bring an hammer to loosen the loonie but we had a good laugh for a couple of bucks.