Place this clip at the rewind point in your edit, then follow it with fart with reverb for a bigger second beat. For a sillier chain, end the sequence with goofy ahh sounds after a reaction cut, keeping this reversed hit first so the joke builds in order.
Über diesen Sound
This is a very short reversed fart sound effect lasting just over a second, played backwards so the familiar burst rushes in reverse. It feels silly and gross in a cartoonish way, turning an ordinary fart joke into something stranger and more surprising, which makes the quick hit land as pure slapstick rather than realistic.