lemon glacier
You line a pan with a cookie sheet, then you piss on it. Put it in the freezer overnight and in the morning you will have a frozen sheet of piss. Now take said piss-sheet and slip it under someone's door for a wonderful surprise.
Brian was being a douche, so I slipped a lemon glacier under his dorm room door while he was sleeping. I lemon-glaciered his dorm room.