Do you know Josh Bazell's "Beat the Reaper"? It's a novel about a WitSec retired mob hitman working as an intern on a hospital in Manhattan. Great humour and action, but here's the prize:
SPOILER ALERT SPOILER ALERT SPOILER ALERT SPOILER ALERT
In the final chapter, the hero defeats his enemy by stabbing him to death with his own fibia - only just removed manually by slicing open skin and muscle on a sharp edge and then grabbing through muscle and tendons and breaking the bone off close to the ancle by smashing it against a table and twisting/pulling the bone from the tendons at the knee!!!
I just read the story and Title Fight sprang to mind with The Heretic stabbing Korak the Cutter with his own broken leg - fantastic story btw :-)
How did you come up with the idea of using your own broken bones as a weapon? I mean, it's not something you hear about that often (like nevah)...
PS. In one of the reviews of the book mentioned, you are actually mentioned by name, when listing which authors spring to mind when reading the book.