There’s a difference between having a survivable cavity and physics. This vehicle was not slowly rolled down the hill. The damage was likely caused by a violent roll down the hill. The vehicle absolutely went airborn multiple times.
With my experience, the driver in this wreck would be dead. Is it possible to defy physics? Yes, but you have a better chance of winning the mega millions. Even then, a driver in this wreck would not be crawling out on their own. The steering wheel is blocking the windshield, the door absolutely will not open without having the door popped and hinges cut. The side curtain airbag wasn’t even cut, which would be one of the first things to do.
I want to see the chain of events this driver claims to have happened. Was he airlifted? He had to go to a trauma center I assume, as he must have had intestinal and/or brain damage from the impacts.
That’s all I’m saying. But if he defied physics, hope he gets better.