As much as I can't stand the way Ozzy has played himself out these days, he's still the guy who sang all those wonderful Sabbath tunes as well as some good stuff earlier in his solo career.
His injuries seem serious - it seems the doctors are playing that down in the article. Blood in the lungs? That can't be good. However, he IS OZZY, and he is among those select few rock stars (i.e. Keith Richards, Bob Dylan) that could do just about anything to their bodies and still survive. At any rate, I hope he's OK and can continue to make a fool of himself and his legacy for many more years.