Mystery Meat Prank
Offices are germ havens. If you've read How Death by Cubicle Works, you know that the average office employee encounters around 10 million germs each day. Disgusting? Yes. But not quite as gross as the foul lunches that sit in break room refrigerators for weeks on end. Tupperware grows murkier with mold as the days wear on.
For April Fools' Day, why not add to that simmering stew of abandoned food in the fridge? We recommend a brown paper bag duct-taped shut to keep away prying eyes. In bold lettering, add a disturbing label to the front to catch people's attention when they fish for their leftover takeout. HowStuffWorks suggests "Brains" or "Weasel" to really get the rumor mill churning.