Place it directly after the confident claim in your edit, then follow it with Oh My God Wow for the reaction, or with Cartoon Slip if the moment turns into a visible mishap.
关于此声音
This is a very short Portuguese voice clip lasting about one second, in which a speaker delivers the phrase 'só que não' — the local way of saying 'just kidding' or 'not really' after a bold statement. It feels cheeky and instantly deflating, turning confidence into a joke in a single beat, and it works best as a quick sarcastic reversal rather than a long punchline.