Put it right after the surprising reveal, then follow it with Oh My God Wow for a second wave, or open with Damn before the reveal so this clip closes the moment. Keep it as the final reaction in a short edit, with no other reaction clip competing for the same beat.
Über diesen Sound
This two-second clip is a single Russian voice blurting out a profane, wide-eyed reaction that translates roughly as 'oh fuck, no way'. The delivery is blunt and incredulous, with the swear words landing as pure disbelief rather than anger. It feels funny, startled and a little unhinged, the kind of outburst that makes an unbelievable moment land even harder.