70 mph into a wall.
http://www.youtube.com/watch?v=lNwtEE9Dd6M
Not one of those cars on string indoors tests.
Real wall, real car, engine working ... BANG !
I reckon even with airbags you'd be seriously injured.
But from 70-0 instantly, I think in any car your body is going to suffer.
Particularly internal injuries and whiplash.