I did it at work. (Some of you might remember that I apparently have trouble dressing myself. . wearing shirts backwards, inside out, etc.)

I had on a long flowy cotton skirt that fit very loosely around my legs (I don't even think I was wearing pantyhose, but I don't remember) so the air issue never really came into play. The bottom part of the skirt was tucked into either the pantyhose or my knickers and I walked out of the bathroom that way. Thankfully a coworker (female) was right outside the door and intervened by screaming "Cathy, your whole @$$ is hanging out!"

First reaction: major embarrassment and humiliation
Second reaction: uncontrollable laughter that lasted most of the day and came back unexpected whenever I thought of Elaine shouting.