Fill someone's hair-dryer with baby powder.
 726
1  

April doesn't fool Chuck Norris, Chuck Norris fools April.
 808
0  

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.
 714
1  

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!
 1513
0  

Install the Blue Screen of Death screen-saver on someone's computer.
 787
3