Place it right after the reveal in a short edit, with sudden suspense building up to the moment and Oh My God Wow following it to keep the surprise going.
关于此声音
This is a single drawn-out voice clip saying 'oh my goshhhhhh' over about 1.8 seconds, with the last word stretched and rising as if the speaker cannot quite believe what just happened. It feels wide-eyed, giddy and a little dramatic, the kind of gasp that turns surprise into a joke instead of a serious reaction.