Here’s mine: I was in a meeting with some coworkers once and my friend walked in late, walked to the end of the table, and said “Sorry, I just crop dusted all of you”. At first nothing happened, I didn’t smell anything, then one woman at the end of the table said “Dear God that’s terrible” and plugged her nose. Slowly but surely the fart wafted its way throughout the room, one of the nastiest farts I have ever smelled, and we had to reconvene the meeting outside because the smell was so bad.
I saw a dude take off at a sprint from a standing position as a gag and he farted right as his foot hit the ground on his first step. It was like a display of rocket propulsion and a crop dusting all at once.