Place this clip at the peak of the reaction sequence, after a bruh sound button for the deadpan beat, then follow it with a scream meme sound button to close the scene before cutting back to normal footage.
About this sound
This clip is a single human voice holding an 'ahh' that keeps stretching into a longer and longer ahhhhh over about ten seconds. It feels absurd and over the top, building from a simple yell into pure release, the kind of exaggerated outburst that makes a tense or silly moment feel funnier instead of serious.