The boing is one of animation's oldest slapstick sounds, traditionally made with a spring or Jew's harp and heard for decades in cartoons whenever a character leapt, fell or recoiled. Online, editors kept the effect because it needs no explanation and pairs naturally with jump sounds like the Mario Jump in gaming edits. The five-repeat version became popular for short videos and soundboards, where a single bounce was too brief but a rapid string of bounces could carry a whole gag, reaction or looped animation on its own.