The time when a person relieves themselves in the bathroom is one of their most vulnerable moments, which makes it a perfect time to pull a prank on them. This video will teach you three awesome pranks to pull on a bathroom-bound person. First, the classic Saran-wrap the bowl trick. Second, creating a science fair volcano in someone's toilet that will erupt when they flush. Third, learn how to remove the water hose from a toilet and turn it into a small automatic flush-triggered water cannon. Brilliant.