When someone wakes up to make coffee half-asleep in their robe and goes to fill up a pot of coffee at the sink, they get attacked by the sink sprayer.
WHAT YOU NEED:
-Kitchen sink with sprayer
HOW TO DO IT:
Make sure the household is asleep. Bring a rubber band to the kitchen sink. Wrap a rubber band around the sink sprayer a couple times, ensuring it is tight. The next morning, you will wake up to someone screaming profanities from the kitchen. Hi-five!