Put it at the exact moment of failure in an edit, then follow it with a shocked reaction sound so the audience has somewhere to land. For a bigger gag, start with a long brain fart and let this clip finish the joke, or stretch the embarrassment with fart with reverb after the first hit.
O tym dźwięku
This is a wet fart lasting just over a second, with a loose, spluttering squelch that bubbles up fast and breaks apart before cutting off abruptly. It feels crude, silly and deliberately messy, the kind of gross-out noise that makes people laugh before they can stop themselves. It is a generic comedy effect, not a line from a film or show, made for reuse in pranks and edits.