One night, you were filling up water guns for a big water gun fight with your high school football team. You put them in the fridge to cool and went to bed.

I stayed up late and after you left the room I peed in both of the small water guns, filling them up completely with urine. The following morning you unknowingly sprayed all of your team mates with piss. You still don't know.

I, however, am very proud of myself.