Definitely been there. No matter what, I always seem to do it when someone is around to watch. I could ride 20+ miles without seeing another soul, but as soon as I'm around people, I botch the unclipping part... This is fine though, as I have little ego problems and brush it off fairly easily.

Of course, I also did this recently infront of 3 other bikeforums members I had just met... That was a tad bit more embarassing, as I spent a good portion of the day trying NOT to do anything that would make a poor first impression