Place it just after the reveal in a reaction edit, then follow it with the Ceeday Huh sound for a second reaction, and close with the Oh My God Wow sound when the moment needs a bigger response.
Über diesen Sound
Ueun is a short vocal reaction sound, just over a second long, centred on one brief uttered sound. It feels awkward and sheepish, like a noise made when someone is caught off guard and does not quite know what to say next.