I liked Unbreakable--although I agree that his others were much better, and he got a lot of the info wrong on the bone disease he used, Osteogenesis Imperfecta. My brother has the same disease, so I know. He described OI Type 4 as "not living very long." The type he was describing is actually Type 2, and as far as I know, there is only one person who survived past the age of two years who had that type. The same boy is between twelve and thirteen and has to be carried around on a pillow, and he's very misshapen. (In the severe cases, the bones bend and corkscrew and do all kinds of weird things because they're so soft.)
The man is described as having a very mild type of OI, with only 30-something lifetime fractures. I can assume, then, that he is Type 1, like my brother. My brother is sixteen and has broken around 56 bones, but he is well enough to participate in sports and many people do not know he is brittle. Most of his fractures have been fingers and toes, relatively small things that are easily mended, although he has broken his back two or three times, spiral fractured his leg once, and broken his femur. However, in part of the movie, Samuel L. Jackson's leg is said to have been broken in fourteen places. If he was that brittle, he would be one of the ones who can't walk. If it broke anywhere under five times, I'd have believed it, but not fourteen. Not from a middle-aged man who has only broken 30-something bones.
The disease, all in all, was not researched well enough for me. I don't know very much about it considering that I spent a great deal of my early years wandering through Shriner's Hospital looking at such patients while my brother had check-ups or had one of his casts removed. But the information is not very hard to find. The Osteogenesis Imperfecta Foundation has done all that it can to make sure the info is there for anyone who needs it.