No documented source, character or original recording is provided for this clip, so it circulates online mainly as a standalone reaction sound under its German phrase. The line itself is an everyday expression of disbelief in German, which helps explain why it travels well as a meme sound beyond German speaking audiences. On soundboards and in short edits it is kept for moments of shock, denial and comic incredulity, where a foreign language reaction can feel funnier and more exaggerated than the same line in English.