In an edit, put the offending remark first, then add the sudden suspense sound, then this clip as the response, and finish with the no no wait wait button if the speaker tries to backtrack and talk their way out of it.
關於此聲音
This is an 8.8-second voice clip built around a single spoken line: 'IDK why but that's racist.' It gives listeners an awkward, bemused feeling, like hearing someone point out a remark that crossed a line in the most blunt, understated way, which is exactly why the reaction lands as funny rather than angry in the moment.