It's quite cringe, but the worst is the prank where a woman put an air bag under a couch cushion on a couch (which was on the second floor of the house) and tried to push her friend onto it. Her friend knew something was up and ended up pushing the prankster onto the couch and it inflated and launched her over the banister and she fell to the ground on the first floor, snapped her neck, and died.
