I only ride with my clipless shoes on about half the time since Im usually wearing my work shoes during my commute. I have the pedals with the clipless on one side and flat on the other.

So there I was pulling into the local convience store, I came to a stop completly forgetting I was clipped in and WAM, I fall right over. Worst part about it there was about 15 people standing around, and another 5 or so waiting in line at the gas pump. Not a very good example for promoting bike commuting =(