shartuitous moment

When you're standing at the toilet whizzing away and proceed to crack out what you THINK... is a fart but unfortunately is not gaseous in nature. Still... you're in a good position to just turn around, drop trou and proceed to salvage your shorts as you are conveniently right there in front of the toilet.

"Dude... it was a most Shartuitous Moment... I was actually IN the can when I had an unanticipated shart attack....."