Place it right after the reveal in an edit, with Sudden Suspense building tension just before it and Oh My God Wow following as the second reaction from the group.
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This is a short Portuguese voice clip, just over four seconds long, in which a man says he is seriously shocked, repeating the feeling with heavy, disbelieving emphasis. It lands as stunned and a little dramatic, the kind of flat disbelief that makes an unbelievable moment funnier. The delivery is earnest rather than shouted, so the shock feels genuine and easy to recognise at once.