my worst moment was when I was waiting at a light and I tried to time it and get into my spd pedals while track standing. Now I had gotten pretty good at it and thought I could do it. I put the cleat over the pedal and pushed down. The botton of my shoe is carbon fiber and VERY slick. My foot slipped off the pedal and through me off balance. My front wheel went sidways and the bike when right out from under me. My shimano 105 brake/gear levers smacked the ground and the plastic peices on tope broke. and I hurt my hands to. But mostly my pride was hurting........