I habitually scared people. It get to the point that people would visit with my roommate and would look in closets and behind doors, etc. to preempt the scare. At work I'd staple pant cuffs to uniforms and watch a coworker attempt to step into his pants and fall over...or the time I filled his work gloves with liquid soap...or smeared grease on the telephone and call him from the other room, he'd have a black streak on his face.
We shaved a guy's leg one time when he passed out. He worked at a tube rental on the river and wore shorts to work every day. It was hilarious...boy, was he ever mad...he had to shave the other leg to match. Another prank was to put vaseline on the inside door handle of the bathroom and then roll a lit firecracker under the door after someone went in there. I replaced the shampoo with chocolate syrup one time. Squirted mustard over the top of the shower once on hubby, telling him he was such a weinie that I thought he might like some mustard on his buns. And the old ice water over the top of the shower trick is still fun. Harmless fun, unlike what this clown did.
One summer I was working with a guy who had a "I [heart symbol] ME" (Translation: "I LOVE ME") sign as a front license plate. At the time, you only had to have an issued RMV numbered plate on the rear of the vehicle. This guy was obviously very full of himself. He claimed the front plate was a gift from his girlfriend. But we did not buy that jive. One day, we took some black electrical tape and added a "N" to the end of "ME." He would never tell us what happened to him on the road in the 2 or 3 days he was driving around with his new "I LOVE MEN" plate, but he was absolutely irate about it.