Place it at the end of a failed attempt, after the mistake is clear and before the next scene starts. Follow it with Bruh for a dry reaction, or lead into Emotional Damage when the failure deserves a bigger fall. Keep the sequence short so the confession stays the joke.
關於此聲音
This is a short Vietnamese voice line in which the speaker says, in plain words, that they are very dumb. The delivery is blunt and self-deprecating, turning an embarrassing slip into a joke at the speaker's own expense. It lands as funny and awkward rather than mean, because the target is the person pressing it, not anyone else.