Don't know if this counts for the Heavy Metal Club, because it happened during a basketball game, not on the bike - but the 26 titanium screws and plate in my forehead will always be there, traveling with me everywhere.
So, I'll apply for membership.
In November of '98 I shattered my frontal sinus cavity when I came down with a rebound and my forehead collided with the top of another player's skull who was standing underneath me. When I started puking blood, it was time to hop on the bike and ride over to the emergency room.
Sorry, don't know if I still have pictures, and probably couldn't figure out how to post them if I did.
So, do I qualify for HMC membership?