In reply to Andrew W:
came off a cracker 30 odd years ago while riding a fixed wheel down a steep hill, the front and only brake started juddering so what did I do, yep braked hard and it came right off and jammed into the front wheel.
head over tits and skidded for what seemed forever. my first only only real bad one which lost a lot of skin and gave me a concussion, no helmets in those days.