We worked with a guy nobody liked over in NZ and started messing with him, it was nothing major, just small stuff. I emptied my money box out and took out all the 5c coins, was about $5 worth. Then I just started leaving them in not very obvious places where I knew he'd come across a bunch of them over time. Nothing real obvious like inside his saw air filter, just little stuff like put one every now and then under a fuel jug, in the door handle of his truck, near his lunch box etc... doesn't sound like anything major, but when you've got them all over it starts to add up. He was sharing a house with another guy and I talked him round to putting them in not so obvious places all round the house. He never said nothing about it, but you've got to imagine he started wondering where all the 5c pieces were coming from. Wondering if it was the same one, or a different one etc..
Then I started just casually slipping stuff into the conversation like;
me "man, drove into work this morning and fueled up and the price of fuel has gone up again"
him "####, really? they're always putting it up"
me "I know man! It's gone up by 5c a litre! The guy was saying it's going up another 5c at the end of the month!"
One of the best ones that happened was totally unplanned. I happened past the target guy and a greenhorn one day and picked up a 5c piece off the ground that I hadn't even put there. The greenhorn wasn't in on it, it just happened;
me "well, look at that... a 5c piece!"
greenhorn "must be your lucky day! Whats the odds of finding 5c out here?"
me "yeah but 5c is nothing really, what cna you buy with 5c?"
greenhorn "might not seem like much, but 20 5c pieces makes a dollar"
me "nobody's going to find 20 5c pieces"
greenhorn "yeah I guess your right, that would be some kind of luck"
All the while, the target guy was looking at us real weird!
We did some other more basic pranks to the guy too... got up to the office one day and emptied out all the 'punches' from the hole punch things. Had a bunch of them... got into his truck, stuffed them all down in the air conditioner vents. Then aimed all the vents at his face and turned the air con full on, and turned the radio on full blast too. Come home time, we were all watching.
Another trick that people use sometimes in aus is the old roadkill on the diff. If you find a small bit of fresh roadkill, get a bit of rope and tie it around the roadkill's neck, then tie the other end to the diff. Make the rope nice and long, 20-30feet is good. Coil all the rope up and bundle it and the roadkill up on top of the diff so you cant see it. When the guy drives off, the roadkill falls off the diff and he's towing it. Big crowd pleaser, especially if some law enforcement happens by.
Shaun