I was on a 55 mile ride with some good hills in 90+ degree heat. At mile 20, I unclipped for a light. I unclipped right side, but fell left...oops. I guess it was bound to happen. I had some scars on that knee from childhood...jusr rescarring the knee. Cleaned it up and bandage it when I got home. I have to say, the last 5 miles were rough!!! Glad to be home!