One of the best ones i ever pulled.......I'll try to make this as short as possible.
I work for FedEx...I use to work out of a town where I hauled freight to another town to give to other drivers, then stayed in that town delivering. Anyway...we had a small warehouse that they parked their trucks in and I was normally there before anyone else showed up for work. When the building was locked you had to enter through a side walk-in door to shut off the security, but you had to step in about 10 feet along the wall to get to the system and/or a light switch so it was cave dark in there early in the morning.
One morning I had an idea for a gag on one of the guys there that liked this kind of stuff. I got a big piece of the large bubble bubble-wrap and laid it in front of the door where I knew he had to walk. I shut the lights off and sat back and waited. When he stepped in the door, it sounded like gun-fire in that building with the echoes......LOL. He's dancing around and looking for a place to hide which just made it worse until he finally got off the wrap. Damn near peed myself laughing.