Change the coffee in the office coffee maker to decaf.
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.
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!
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.
Office executive "Sir, can I have a day off next week to visit my mother-in-law?" Boss "Certainly not!" Office executive "Thank you so much sir! I knew you would be understanding."
The Captain called the Sergeant in. "Sarge, I just got a telegram that Private Jones' mother died yesterday. Better go tell him and send him in to see me." So the Sergeant calls for his morning formation and lines up all the troops. "Listen up, men," says the Sergeant. "Johnson, report to the mess hall for KP. Smith, report to Personnel to sign some papers. The rest of you men report to the Motor Pool for maintenance. Oh by the way, Jones, your mother died, report to the commander." Later that day the Captain called the Sergeant into his office. "Hey, Sarge, that was a pretty cold way to inform Jones his mother died. Couldn't you be a bit more tactful, next time?" "Yes, sir," answered the Sarge. A few months later, the Captain called the Sergeant in again with, "Sarge, I just got a telegram that Private McGrath's mother died. You'd better go tell him and send him in to see me. This time be more tactful." So the Sergeant calls for his morning formation. "Ok, men, fall in and listen up." "Everybody with a mother, take two steps forward." "Not so fast, McGrath!"
An organization is like a tree full of monkeys, all on different limbs at different levels. The monkeys on top look down and see a tree full of smiling faces. The monkeys on the bottom look up and see nothing but assholes.
Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.
Remove the shower head and place a chicken bouillon cube in it, then put the head back on.
April doesn't fool Chuck Norris, Chuck Norris fools April.