yeah it was a good stack. Looks like he hit the dirt mostly. Although surprisingly if you fall on rocks you sort of bounce of them and then are still in shape to ride, but the next day is pretty brutal.
Im with Bill, been there too many times because I suck, last one I planted my lower back on a curb after doing a surge like hop off of a bench trying to go to the street. Rear tire didnt quite make it to the street, hit the curb, looped out, planted my back on the curb, paralization is the first thing you think about.