Stole colleague’s desk chair after hours, gave it cartoon eyes and mouth, took Polaroids of it in compromising positions around the museum we worked in, then turned photos into a treasure trail for him to traipse round the next morning before he could sit down to start work.

No prank I've ever perpetrated could hold a candle to one my husband was involved in as an undergraduate music major. During some unsupervised late-night rehearsals in the music building, several friends loaded up every potted plant and potted tree in the building - quite a lot of them, apparently - and moved them all to the front of the main choir room. Some genius added a sign reading "Do not move these plants." The choir director basically navigated a thicket for several days before finally asking any questions.

I took a retired USAF cargo parachute... jacked up a car ...wrapped the car with the parachute... and tucked the parachute under the tires ... let the car down and went home with the jack.

HZ: Christo and Jeanne-Claude made an art career of this.

As students, a friend and I wrote an illegible letter to a fellow student wherein you could just make out the words "coming" and "to stay" (illegible sender's name).

A friend shaved off half his hair & beard for Halloween. That evening joined us for drinks, sat next to a woman he’d never met and never turned to look at her; after an hour he turned and she almost wet herself laughing!

When the film Snakes on a Plane was still in production and only really known to readers of a certain webcomic, I told a friend about it in a way that made him assume that I was making it up as a joke. Months later, he started seeing ads for it and was freaked out.

Put a sheet of bubble wrap under the bath mat. It’s simple, but glorious. I think I’ve done this to every roommate I’ve ever had.

Hubby once put quick-drying cement in the coffee mugs of his colleagues, so that they could only get a centimetre of coffee in the top of the mug.

I convinced a coworker that a newly-hired coworker had a glass eye, and that she didn't like to talk about it. Promptly forgot about it until dupe sent me a text four months later, promising revenge.

I printed out a bunch of TERRIFYING old-timey Halloween costume photos and mailed them anonymously to a friend with creepy poetry pasted on the back. He thought he was being targeted by a serial killer.

For April Fool's I ripped up an entire Sunday edition newspaper, opened an umbrella upside down, put all the paper bits in, closed it and put it back in the cupboard. Only problem was, it didn't rain on April 1st. Baffled outrage some weeks later.

My coworker put tape on the bottom of a neighbouring coworker’s mouse, switched their keyboard cable with his own, and proceeded to type strange stuff on the coworker's screen...

On a construction job, I Sharpied my coworker's tape measure to change all the 3s into 8s.

HZ: Oh that’s funny UNTIL A BUILDING FALLS OVER.

A friend boiled his flatmate’s eggs and put them back in the box in the fridge. The flatmate was very confused when he tried to crack them!

