It looks like that road has some crown on it. He has a little reverse lock coming out of the apex and then as he crosses the crown he starts to put in more and loses it. He just gets behind the car. Maybe something went wrong. You have to be willing to give up and go for the brakes very early in an incident at a hillclimb. You just don't have wide pavement and runoff areas. On the other hand you have to be pretty aggressive to put in a good time, so just like at fast tracks you on the edge...
Ouch is all I can say, out side of all that other stuff I said.
Notice how little he needs to turn the wheel to do his cornering though.