The exact original recording behind this clip is not widely documented, so it is best known as a circulating reaction sound rather than a line from a named film or show. Its green screen association comes from how creators use it: the voice is dropped over edited footage to stand in for the audience's reaction, especially when a reveal is too absurd for a normal response. Because the delivery is instantly readable even without context, it keeps resurfacing in short-form edits, reaction compilations, and meme videos where a single exaggerated gasp can carry the joke.