Not a fart exactly, but many moons age I was getting into a girl I worked with. She was a few years older, but was fit as fluff and really experienced.
I was as proud as punch. That was until one day when I'd eaten a terrible chicken kebab from some dive in town washed down with a good few pints of ale.
Anyway, my bowls started to have violent twitches, and I scurried off to the work toilet as an explosive movement was trying to free itself from my sphincter.
After what can only be described as an explosion that would have set off some of US sonar nets out in the mid-Atlantic, I came out looking rather sheepish.
She was knocking it into the bin because of the toxic odour I'd left in the room as I dashed, with the additional scent coming out pushing her over the edge.
Saddam would have used it for a WMD if he'd had known. Sadly, I never got to goose her ever again as she said it was all unnatural and told me to k'off.