Seinfeld ran on NBC from 1989 to 1998, and its distinctive slap bass theme, composed by Jonathan Wolff, was used in short bursts to bridge scenes instead of a traditional laugh track transition. The riff became shorthand for the show itself, instantly signalling its observational, deadpan humour. As clips and edits spread on YouTube and TikTok, creators began lifting the transition sound to give their own videos a sitcom structure, and it remains popular because a few seconds of bass is enough to tell viewers a joke has landed.