Air horns have long been used in schools, factories and sports venues as a loud warning signal, and the fire drill version became a familiar sound effect as creators began reusing real drill alarms in short videos and prank edits. Its one-second length makes it easy to drop into memes, reaction clips and gaming montages without breaking the pace. It remains popular because the sound is instantly recognised, carries a built-in sense of urgency and works as a simple audio punchline across many different kinds of content.