The sting comes from Law and Order, the long-running American police procedural and legal drama that began on NBC in 1990. In the show, the two-note sound bridges scenes, signalling a move to a new location, time, or stage of a case. As clips and parodies spread online, the sound became shorthand for a sudden shift or a serious turn, detached from any single episode. Its brevity and instantly recognisable rhythm have kept it in use for memes, sketches, and video edits long after viewers first heard it on television.