The phrase has circulated online as a short meme sound rather than as a clip tied to a documented scene, and its appeal is in its plain wording. Kooky has long been used in English for someone eccentric or oddly behaved, so the line needs no setup for most listeners. Creators reuse it as a quick reaction sound for group chats, gaming sessions and short-form edits, where a brief spoken judgement works better than a longer explanation. Its continued use comes from that versatility: it can tease friends gently or sum up a strange moment without turning the joke mean-spirited.