Place it at the end of a reveal, just as the lie is exposed, then follow it with awkward crickets to let the moment hang. For a bigger reaction, add a shocking sting after the pause so the accusation lands before the next scene begins.
關於此聲音
This is a short 2.2-second spoken clip in Portuguese, built around the line 'Os olhos nunca mentem', meaning 'the eyes never lie'. It feels knowing and quietly accusatory, like a warning that a person's expression has already given them away. It works as a serious, dramatic call-out rather than a light joke.