This involves first waiting until the victims back is turned. You must then pull down your trousers and underwear, completely exposing your cock and balls. You then wait for the victim to turn around, and perfectly time a vertical
jump, to ensure that you are completely airborne when their eyes first meet your tackle. The
jump has a sort of 'zero gravity' effect on the male genitals, causing them to float up from their
normal position, thus creating a new, unexpected and interesting
way of pranking your victim.