Thanks everyone for the good wishes. For Sojourn: I have been thinking a lot about the "coming unclipped" process and how it happened. It may well be that I never completely clipped that shoe into the pedal after I started. Those pedals have 10K+miles and the shoes/cleat even more. I have the adjustment set to easily unclip. The pedals are SPD/Shimano and I do not believe that they were the cause of the unclipping. Too many other factors involved, including my complete disregard for something as simple as getting a solid clip-in before standing up. Cheers to all.