The sound comes from a well-known viral TV moment involving Brazilian journalist Lasier Martins, remembered online as the Lasier Martins shock clip. The footage spread widely in Brazil through reposts, compilations and meme pages, where its abrupt reaction became a shorthand for instant regret. It is still used because the setup is simple and the payoff is immediate, making it easy to drop into short comedy edits, fail videos and surprise reaction posts.