Hide an alarm clock in someone's bedroom and set it for 3:00 a.m.
838
0
Write a message on an upside-down paper cup that alludes to something horrible being trapped under it.
Leave it on a coworker's desk or in a conference room.
1557
1
Put a "Please Use Other Door" sign on the entrance to your office building if it only has one entrance.
1553
1
Take a squirt gun into the rest room stall next to someone and shoot little drops over the wall every couple of seconds while pretending to pee.
811
0
Install the Blue Screen of Death screen-saver on someone's computer.
