Most of us who use pedal retention systems have experienced the embarrassing moments of failing to release from the pedal when we first learn use them.
I was talking with a friend last night whose fiancée tried clipless pedals for the first time last week. As she keeled over during a stop, the handlebar flipped around and she fell right on the end of her flat bars! After a few days of pain, she went to the doctor who diagnosed the broken ribs.
What's the worst newbie injury you know of from failure to disengage from the pedals? What about injuries from unintentional release from clipless pedals?