Absolutely Adequate wrote:Here's what I want you to do if you find out it's the boss:
Get an old record sleeve and fill it with shaving cream. Slip the open side under his door. Jump on it. Run away.
Laugh when he complains his office is covered in shaving cream.
Waiting until he leaves, putting flour under his door, and powering it up with a blow dryer.
Also, my favorite "harmless" prank is to adjust someone's chair. Whatever handle they need to grab to fix it, smear something greasy on the underside of the handle. For extra fun, replace the grease with some smelly-good lotion borrowed from a girl in the office. Later, ask the co-worker why he smells like lavender.
Not that I've ever done anything like either of these...