Three times. All due to idiot error.

1. First one, two weeks after going clipless. Coming up to a red light in peak hour traffic. Go to unclip the left foot and accidentally grabbed the (right) front brake. Over the bars I went and broke my elbow.

2. Trying to be smart. Tried trackstanding at a red light. I had the left foot unclipped so I could put my foot down when I couldn't balance anymore. I leaned right instead...

3. Not paying attention to my cleats. I replaced the cleats on my shoes and didn't check the orientation correctly. Riding up a hill with a friend. He stopped to use his inhaler for his asthma. I stopped but couldn't unclip because I'd put the cleats on the wrong shoe (left cleat on right shoe).

1 & 2 were with single sided SPD MTB pedals and shoes on a hybrid/commuter. The third one was with Crank Bros. Mallets on my recumbent. In the 2nd & 3rd instances I only hurt my pride.