We had a poor soul at my last gig who had a sudden case of sushi related diarrhea on a Learjet 31 with 7 pax aboard. I think the story went that the pax held up their jackets to give him some privacy - and the pax had to go sit in a pilot seat (for lack of anywhere else to go) while he did his business.

(Shudder) I'd have had to quit, change my name, and move to Canada.