Place it right after the mistake is shown, then follow it with Oh My God Wow for a second reaction, or open with Sudden Suspense before the reveal and let this clip deliver the payoff.
Über diesen Sound
This 4.7-second clip is a Portuguese voice exclaiming 'Ehh desgraça, misericordia meu deus' in a drawn-out, exasperated tone, as if reacting to a sudden disaster or an unbelievable mistake. It feels dramatic, funny and a little desperate, the kind of over-the-top dismay that makes a bad moment funnier instead of worse.