Place this clip at the reaction beat after the mistake is visible, then follow it with an oh my god wow button for a bigger second reaction, or precede it with a sudden suspense sound button to build tension before the payoff lands.
このサウンドについて
This clip is a very short vocal exclamation lasting under a second, a single sharp cry delivered as a quick reaction. It gives a listener a burst of surprise and disbelief, the kind of startled, slightly comic feeling that lands when something unexpected happens and words are not needed to sell the moment at all.