Seinfeld ran on NBC from 1989 to 1998, created by Jerry Seinfeld and Larry David, and its scene changes were marked by short slap bass lines composed by Jonathan Wolff. Wolff varied the riffs to match Jerry's stand up routines that opened many episodes, making the bass a running signature rather than a fixed theme. Clips of the transitions later spread on YouTube and soundboards as a shorthand for sitcom timing, and creators still reuse the riff whenever a real life moment feels staged like a 90s comedy cut.