Place it right after the reveal in an edit, with Sudden Suspense building tension just before it and Oh My God Wow following as a second reaction, so the surprise peaks twice instead of fading after one reaction.
About this sound
A male voice delivers the line 'No way, I can't believe this!' in under three seconds, pushing the words out in a stretched, dramatic rush. The outburst feels funny and startling at once, turning a small surprise into a moment that sounds far bigger than it is.