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

 796

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.

 803

0  

Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.

 952

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.

 784

1  

Hide an alarm clock in someone's bedroom and set it for 3:00 a.m.

 833

0