Put a "Please Use Other Door" sign on the entrance to your office building if it only has one entrance.
Change the coffee in the office coffee maker to decaf.
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!
April doesn't fool Chuck Norris, Chuck Norris fools April.
A black woman was filling out forms at the welfare office. Under "Number of children," she wrote "10," and where it said "List names of children," she wrote "Leroy." When she handed in the form, the woman behind the desk pointed out: "Now here where it says "List names of children," you're supposed to write the names of each one of your children." "Dey all named Leroy," said the black woman. "That's very unusual. When you call them, how do they know which one you want?" asked the welfare worker. "Oh, den I uses the last names."
Place a pair of pants and shoes inside the only toilet stall in a rest room to make it appear someone is using it all day.
Two programmers after work, talking in a pub: "You will never believe me when I tell you what happened to me yesterday. I met a very nice blonde in a bar." - And what did you do ? "I invited her to my place, we had some drinks and then the girl asked me to undress her." "Are you kidding me ? And what did you do then?" "I got her blouse and her dress off and then i got her to sit on my office, right next to my new laptop." "Oh, you got a new laptop. What model and what are its specifications?"
Q: Why did the can crusher quit his job? A: Because it was soda pressing.
Install the Blue Screen of Death screen-saver on someone's computer.
Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.