The origin of this gu gu gu loop is not clearly documented, so it circulates online mainly as a short shareable reaction clip rather than a quote from a known scene. Its appeal comes from the bare repetition, which listeners can attach to babies, pets, confused characters or anyone acting goofy. On soundboards it sits alongside other nonsense vocal sounds, easy to find by its spelled out title and quick to drop into edits, chats and short videos whenever a scene needs a light, silly response instead of dialogue.