Place it at the end of a short scene, right after the reveal, as the closing reaction. Put Bruh just before the reveal to set up the fall, then follow this clip with Fart With Reverb for a second, messier payoff that keeps the joke moving.
About this sound
This clip is a short vocal burst run through heavy reverb, so a single syllable stretches into a wide, echoing wash that hangs in the air. It feels dramatic and a little ridiculous at once, like a tiny moment suddenly given a huge stage, and it works best as a punchline that arrives after the joke rather than before it.