Seinfeld premiered on NBC in 1989 and ran until 1998, with its scene changes marked by short slap bass riffs performed as variations on the show theme. Unlike a fixed theme song, the bass lines were tailored to Jerry Seinfeld's opening monologues, which made every transition feel slightly different. Clips of the riff later spread online as a reusable sitcom cue, alongside other television stings like the Law and Order DUN DUN, and it remains popular because a few notes instantly frame ordinary footage as dry, observational comedy.