The riff comes from Seinfeld, the American sitcom that aired from 1989 to 1998 and followed Jerry Seinfeld and his friends through everyday New York life. Its slap-bass theme was used between scenes, and that brief musical bridge quickly became one of television's most recognisable sounds. As clips spread on YouTube, TikTok and in meme edits, the transition was lifted out of context and reused as a standalone joke cue. It endures because it instantly signals a scene change while carrying a knowing, sitcom-style wink.