Place it right after the reveal in a short edit, with Sudden Suspense just before it and Nelson's Ha-Ha just after it, keeping the reaction in the middle of the sequence.
このサウンドについて
This is a short voice clip, about 2.2 seconds long, in which a speaker delivers the Brazilian Portuguese exclamation 'Eita cabamba, ixi Maria' in one quick burst. It feels startled and playful, like a sudden double-take at something unexpected, and it lands as a light, comic reaction rather than a serious comment.