When it was initially reported it was said his injury didn't happen in any particular match it was just an injury that had been bothering him and he'd been putting it off. That was when it was supposed to be minor though, so maybe he did something that made it worse?
He came to Birmingham and didn't get the Dr. James Andrews treatment? That's a B+ player if I've ever seen one.
Is there any chance this is a work to showcase him ala his ability to get back up after the ring collapsed? A shattered elbow seems like the sort of thing you'd notice before they cut you open to look. If it's legit, I suppose his stock just went up to have been working with something that bad.