Known in Brazil as foguete apito and apito gaiato, this whistle comes from the real sound a bottle rocket makes as air rushes past it during launch. Clips of that rising whistle were shared on soundboards and short video edits, detached from any actual firework show. Creators began laying it over cartoons, sports misses and sped up escapes, and the name stuck because apito describes the whistle perfectly. It remains popular because the rising tone alone signals launch, speed and an incoming comic payoff without needing any context.