XP

This is NOT something that should be used on strangers.

Once upon a time, I learned a prank from a Captain Underpants book. This prank is very easy setup and will definitely cause a reaction. All you need is two of those small ketchup packets (or any other sauce).

Using your ketchup packets, you can now booby trap any toilet. Simply fold the packets in half and place them under the nubs of the toilet seat. What happens next should be obvious.

This is the kind of prank you don't do unless it's for revenge.