Put it at the payoff point of a prank edit, after a slow build-up and just before the reaction shot, so the surprise lands on camera. Follow it with Vine Boom for a second hit, or open with MLG Air Horn to build the joke in two steps.
About this sound
This is a single, super-loud airhorn blast lasting just over a second, with a harsh, piercing tone that cuts through background noise instantly. It feels startling and over the top, turning a quiet moment into a sudden jolt that makes people jump, laugh, and look around for what just happened.