Place it right after the frantic build in your edit, just before the payoff scene. Open with a panic beat from the no no wait wait button, let this clip answer it, then move straight into the final result without adding another reaction on top.
Über diesen Sound
This is a 1.5-second voice clip of the Spanish word tranquilamente, meaning calmly, delivered as a single spoken reaction. It gives a listener an unbothered, soothing feeling, like someone quietly telling a tense room to slow down and breathe instead of escalating.