I keep trying to slow the video down, and pause it at the crash... But I can't see exactly what object she hits. It looks like a jutting rock and something else, but I'm not sure. I didn't see how exactly she was hit either, but at first glance it just looks like it should be a couple of broken bones.
How unlucky...
At 1st, I also didn't realize, what exactly has happened. It is very hard to tell, watching the video alone w/o the background information. However, sad...