What's the cruelest practical joke you've ever pulled?

Stop me if this has been done before and show me the link.
I have need for one of those absolutely perfect practical jokes that can’t be traced back to me but provides for a high level of embarassment. My twenty-year reunion is coming up and I owe somebody payback big-time. If revenge is a dish best served cold, this needs to be below absolute zero.
I’m looking for those that have been pulled, not urban legends that your friend knows were pulled by someone who knows someone he knows. I need a reasonable expectation for success. I don’t want to cause any physical injuries, just good, old-fashioned loss of self-esteem and respect before an audience of peers.

Any suggestions?

We had a Halloween practical joke that was screwed up by our associates years ago, so we did one on them. We hid a tape recorder and had a nuclear war on the radio.
If you get them drunk enough, they will believe anything.
Maybe you could just have a big wreck on the freeway and kill their families.
:slight_smile:
Good luck.

Years ago I did the “disappearing ink” trick pen (available at gag and magic shops).

You ask someone to sign your autograph book, using your “fountain pen”.

It’s designed to squirt disappearing ink. Looks like you’ve ruined her clothes, but it disappears.

The only trouble was, it didn’t disappear fast enough, and she didn’t believe it was an accident, and made a scene.

She was a friend, so I eventually calmed her down, but she was still wet and rumpled and pissed.

That was my first and last stab at “practical jokes”.

I’m not proud of this one, I was in high school and not especally intellegent. I was on a school trip with my drill team and one of our guys had proceeded to really piss us off. So we taped him up into a ball and thew him into the pool. He floated for about 15 seconds and then began to sink. We let him sit at the bottom of the pool until just before he passed out – we dragged him out, woke him up, he bitched, so we threw him right back in. This time when we dragged him out he didnt bitch – we left him there to wiggle his way out of the tape
Yeah, really childish and stupid – but then, so is high school.

The local library has the librarian from hell. She patrols the aisles, bookcases and reading areas just waiting to hear any noise. All you have to do is turn a page on a newspaper and she is behind you, hissing into the back of your head and commanding “SILENCE” in a Pall Mall rasp.

The time came when we could stand no more, we went to a pet store and bought 1,000 live crickets that were intended as lizard food. The crickets came nicely packaged in a small carboard box with holes, we snuck them in in a bag and salted them all over the library.

Now, the librarian from hell is busy chasing crickets and leaving everyone else alone.

When my brother and I were preteens, he went through a monster phase. He had built all the plastic movie monster models (Dracula, Werewolf, Mummy, The Creature from the Black Lagoon, a miniature guillotine, probably more I left out). He used to buy Creepy and Eerie magazines, and read a lot of mystery and murder fiction (plus Oscar Wilde’s The Portrait of Dorain Gray).

He told my sister and I that through an optical illusion, if he stared long enough at some of the models when he was trying to fall asleep at night, and the moonlight coming in the windows was just right, some of the models seemed to disappear. So I knew that he lay awake at night staring at his models.

One night, from my room across the hall, I heard him get up and go downstairs, probably to the bathroom. I don’t know what possessed me, but I snuck into his room, opened a big trunk (it looked like a treasure chest to us) at the foot of his bed, crawled inside and closed the lid (no safety issue; my parents had broken the lock and it never sealed tightly anyway). I heard my brother come back to bed. I waited about five minutes, and slowly rose out of the trunk, and then hollered “Boo!”

He later told me that he saw his life flash before his eyes, just like in the cartoons. I don’t remember what he did at the time, but it was probably a good thing he had just gone to the bathroom. And looking back on it, I think it was really mean. But hey, I was only eleven or twelve at the time.

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I had a hand in pulling off a nasty little prank once.

I was working at a newspaper and my editor, Maggie, had run into her brother Dave’s former girlfriend Sally. Back in highschool Dave and Sally had dated for awhile, but lost touch soon after graduation (Dave was in the Navy and was shipped overseas). The two had lunch together and hatched a plot to pay Dave back for some prank he’d pulled on Maggie.

Maggie called Dave and casually mentioned she’d run into Sally, and given her Dave’s E-mail address.

So Dave gets this long E-mail which includes photos: Sally pregnant, Sally with her baby (the baby has a “Portwine” birthmark), Sally’s birthmarked son as a toddler, Sally’s birthmarked son son graduating high school, etc.

I should mention at this point that Dave has a Portwine birthmark on his cheek and over an eye.

As you have probably guessed, I and some of the guys in the art department has doctored the birthmarks in.

I had a hand in pulling off a nasty little prank once.

I was working at a newspaper and my editor, Maggie, had run into her brother Dave’s former girlfriend Sally. Back in highschool Dave and Sally had dated for awhile, but lost touch soon after graduation (Dave was in the Navy and was shipped overseas). The two had lunch together and hatched a plot to pay Dave back for some prank he’d pulled on Maggie.

Maggie called Dave and casually mentioned she’d run into Sally, and given her Dave’s E-mail address.

So Dave gets this long E-mail which includes photos: Sally pregnant, Sally with her baby (the baby has a “Portwine” birthmark), Sally’s birthmarked son as a toddler, Sally’s birthmarked son son graduating high school, etc.

I should mention at this point that Dave has a Portwine birthmark on his cheek and over an eye.

As you have probably guessed, I and some of the guys in the art department had doctored the birthmarks in.

A few months back there was a thread with some outstanding contributions. Here’s the link:

http://boards.straightdope.com/sdmb/showthread.php?threadid=28136

There’s a pretty effective one if you can get into his/her car… All you need is a short (2 feet) piece of wire with alligator clamps on each end. (Radio Shack sells them.)

Climb up under the dash and connect the wire from the brake light switch to the horn circuit. Every time he steps on the brake the horn goes off.

Simple, cheap, and oh so humiliating!!!

The classic “funnel trick” works for me. We actually pulled it off in high school physics class once.

Get yerself a standard funnel and shove the stem down the front of your pants. Then, take a quarter and try to roll it off the bridge of your nose and into the funnel. Deliberately miss a couple times and tell the target that “This is a lot harder than it looks.” If you’re lucky, the target will want to try himself. When he puts the funnel in his pants, pour a quart of water into it. Instant laffs.

The downside, though, is that your potential target might know the trick himself and the joke might backfire.

Spider woman…you are evil, do you know that? :smiley:
These are the kinds of tricks my older sister used to pull on me when I was six or seven years old. I still have the scar on my forehead from the time she jumped out of the shower while I was sitting on the toilet. I jumped so hard, I slid off the toilet and slammed my forehead into the wash basin.

an anonymous note to a popular guy saying “Dearest, I’m pregnant.”

Well, this one’s not evil, but I still think it was the best I ever pulled. I once wired my mom’s toilet so that when she sat on it, a 120 db siren went off. HEHE- oh, it was a blast! I can still hear her yelp!

Not sure if this qualifies, but when I was working at a hotel, I gave a business traveller a message from his wife when he checked in.

It just said “Happy Father’s day.” I didn’t think anything of it, since it was Father’s day weekend.

Until his buddy said, “Wait, you guys don’t have any childr…” and stopped.

He just looked at me and said, “You’ll make sure the phone’s turned on, right? Like, right away?”

Took me a few minutes to realize what had just happened.

I think it was probably the time that a very foolish and trusting person gave me the combination to his gym locker, because he couldn’t open it, but I could.

I could also, for reasons long since forgotten, decide to give said locker combination to two friends of mine. One of whom “borrowed” his mother’s Chanel No. 5 perfume. Both of whom opened said locker and doused his street clothes with same, liberally, while we went off to roll call. :eek:

Imagine a junior high boys gym, with many occupants of said gym fully aware that one locker, in particular, contains clothes with “that feminine smell” (and, no, not fish, you pervs!). And when a certain individual opens his locker, everyone who didn’t know, now does. Banging on lockers, and screams of “I smell a woman in here!”, commence.

But dammit to hell, they told me the stuff wouldn’t wash off EASILY. And most of it DID!