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.
 1481
1  

Fill someone's hair-dryer with baby powder.
 758
1  

Paint a bar of soap completely with clear nail polish so it won't suds up.
 754
1  

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.
 771
0  

I just recently discovered that there is a national holiday named after Atheism. April FOOLS day. Like this story in the name of Jesus.
 1992
0