Place this clip right after the reveal or mistake in your edit, as the first reaction beat, then follow it with the Bruh sound for disbelief and the Emotional Damage sound if the moment keeps getting worse.
About this sound
This is a brief vocal clip of Denis Brogniart letting out a single drawn-out 'Ah', lasting just over a second. The flat, startled delivery feels awkward and funny, like a reaction caught mid-thought, and it works best as a deadpan response to something unexpected or overblown.