The sound comes from Taco Bell's advertising, where a deep bell toll matches the bell in the chain's logo and name. As a short isolated clip it spread through meme edits, YouTube compilations and TikTok, where editors use a recognisable brand sound out of context for comedy. Unlike a generic bell, this specific low bong is tied in listeners' minds to late-night fast food, so the reference lands instantly. It remains popular because one hit can turn an ordinary moment into a mock trailer reveal.