Place it immediately after the reveal in an edit, then follow it with Emotional Damage for a comic escalation, or follow it with Oh My God Meme as the second reaction before the scene moves on.
About this sound
This nearly ten-second clip is a spoken Spanish reaction in which a voice says it saw something and could not believe it was real, ending on a blunt English 'wtf'. The delivery is wide-eyed and incredulous, turning simple disbelief into a funny, shareable moment of shock. The tone stays playful rather than angry, so the shock lands as comedy instead of a complaint.