Step 1: Piss on a plate Step 2: Carefully place it in the freezer and wait until it is frozen. Step 3: Take the piss disc off the plate late at night. Step 4: Slide it under someone's door. (Preferably someone you're angry at.) Step 5: Wake up early and listen to them bitch about a mysterious puddle of piss on their floor. Step 6: Laugh hysterically!