Place this clip at the reveal itself, not over the build-up, then follow it with the Dun Dun Dun Sound Button for a second beat. For a lighter ending, swap that follow-up for the Anime Wow Sound Button and let the scene close there.
About this sound
This clip is a single drawn-out human scream that starts as a flat aaaa and climbs into a loud, full-throated AAAA, lasting just under nine seconds. It feels funny and wildly exasperated at once, like pure frustration finally bursting out, which is why listeners use it when a situation is too ridiculous for normal words or reactions.