Before the excretement occurs the individual can suffer large amounts of panic/anxiety before the event and embarrasment and disdain after the event, especially if witnessed by passers-by. If one manages to avoid getting caught short then the individual can enjoy a warm, triumphant feeling of relief and accomplishment.
Also getting "caught short" is a phenomenon largely related to binge drinking and is not gender specific!
Man 2: Yeah I know - I got caught short ten yards away from the toilet. Nobody caught me in the act though as I faced the wall and pretended I was texting a friend! Complete fucking gayness but I got away with it!!