Seinfeld ran on American television from 1989 to 1998, and its short slap-bass bridges quickly became one of the show's most recognisable trademarks, marking every shift in time or location without dialogue. The riff was designed to feel like a live band in a comedy club, which helped give the series its laid-back, observational tone. As clips and parodies spread online, editors began lifting the transition for unrelated videos, much like the Law and Order sting, and it remains a shorthand for a sitcom-style scene change.