Air horns have long been used at sporting events, celebrations and on boats to grab attention over crowd noise, and that same loud, instantly recognisable blast made them a natural fit for online video. As short-form comedy, reaction clips and sports edits grew, creators began dropping the sound over goals, fails and surprise moments because viewers recognise it immediately, even without context. It remains popular because it needs no explanation: one blast signals excitement, mock triumph or playful interruption, and it works across languages and formats, from pranks to highlight reels.