Place it at the end of a failed attempt or a long pause, then follow it with a funny laugh to sell the joke, or cut to the Directed by Robert B. Weide cue for a mock-serious finish.
About this sound
This is a short, roughly two-second fart effect with a deep, over-the-top tone that hits hard and ends bluntly. It feels crude, silly and deliberately awkward, turning a straight face or a tense pause into an instant joke. People reach for it when they want lowbrow humor without any setup, because the noise alone is enough to make a scene feel ridiculous.