Put a "Please Use Other Door" sign on the entrance to your office building if it only has one entrance.
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.
Change the coffee in the office coffee maker to decaf.
Pull on a coworker is to press ctrl+print screen on their workstation, then paste it into Paint, save the pic, and set it as the desktop background. Move all of their icons to the trash. When they get back to their desk, clicking won't accomplish anything!
Remove the shower head and place a chicken bouillon cube in it, then put the head back on.
Wife asked her husband to give her the newspaper. Husband: "How backward you are? Technology has developed so much and you are still asking for the newspaper... Take my iPad..." Wife took the iPad and killed the Cockroach. Husband faints. Moral: Whatever the wife asks, give her without argument. Show your smartness in office, not at home.
At Andersen Air Force Base, Guam, a man in civilian clothes approached an airman and requested a vehicle pass. The young airman, fresh out of technical training, asked to see his military ID, driver's license and his vehicle registration. Noticing the letters BG on the man's identification, the new airman asked, "What's BG stand for - Big Guy?" "No," the man replied, leaning over the counter. "Try Brigadier General."
Find a sleeping person, fill their hand with shaving cream and then tickle their nose.
Fill someone's hair-dryer with baby powder.
Hide an alarm clock in someone's bedroom and set it for 3:00 a.m.
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.