Place it right after the blunder is fully visible, then follow it with the Windows XP error for a system-failure beat, or lead in with the Law and Order dun dun before the confession for a mock-serious reveal.
關於此聲音
This is a clean, isolated 1.7-second line from G.O.B. in Arrested Development, delivered in a flat, resigned voice with almost no background noise: 'I've made a huge mistake.' It lands as funny, sheepish regret, the sound of admitting a blunder a moment too late, and it works because the delivery is so understated for such a big admission.