The exact original source of this clip is not clearly documented, so it is best understood as an internet reaction sound rather than a line tied to one famous scene. Short slang reaction clips like this spread through meme edits, short-form videos and soundboards, where a single phrase can become shorthand for disbelief. Its appeal comes from that simplicity: listeners recognise the attitude instantly, even without knowing the full context. Because it is so brief and easy to drop into an edit, it continues to circulate as a quick sarcastic response.