Put it at the very end of a short skit as the final punctuation, after the setup line has landed. Follow it immediately with oh brother this guy stinks for a second reaction beat, or precede it with a rimshot if the scene needs a staged punchline first.
Über diesen Sound
This clip is a single, very short fart noise lasting under half a second, presented as number 19 in the Shitty Jim set. It lands as crude gross-out humour, the kind of blunt, childish blast that makes a moment feel instantly silly and a bit disgusting, perfect for undercutting someone who is taking themselves far too seriously.