Put it right after the bold claim and just before the failed result, so it frames the payoff. Follow it with Vine Boom Sound Effect for the impact, then SpongeBob Fail Sound Effect to underline the mistake, or open with Dramatic Dun Dun Dun Sound Effect before the claim for extra tension.
Über diesen Sound
This is a brief 1.6-second voice clip of the line “Are you sure about that,” delivered with a pointed, questioning tone. It gives a sharp, teasing feeling of doubt, like catching someone mid-boast before they are proved wrong. Shared widely as a John Cena reaction meme, it works as an instant challenge to an overconfident claim.