Place it at the end of a short failed-attempt sequence, after long brain fart sets up the confusion, then follow it with fart with reverb for a layered gross-out finish that keeps the joke moving.
About this sound
This short meme clip pairs a hesitant, drawn-out double 'ehh' with a sudden loud fart noise, turning a moment of doubt into a crude punchline. It feels silly, gross and deliberately awkward, the kind of sound that makes a room laugh while everyone pretends to be disgusted. It works best as a quick reaction to a bad idea or an embarrassing slip.