When I saw the title of this thread, my mind wandered...
In 2006, Steelers QB Ben Roethlisberger was nearly killed when the motorcycle he was riding crashed into some lady's fender, and said QB kissed the hood. Although he wears a helmet for a living, he was not wearing a helmet at the time of the crash.
The next day, this listing went on eBay:
http://www.superunknown.com/docs/benhelmet.pdf