The absorbtion and dispersion of energy in an accident is seen in the distortion of the vehicles, along with sound, and friction observed. Like what was said before, its not the collision, its the sudden stop. There's no way for the mechanics of physics to keep you in motion long enough from 120 to a dead stop almost instantaneously to survive that sort of an impact. That would involve you passing through the vehicle and the wall, mostly unscathed. Since there is a very small x distance to slow down to your new velocity, v=0, you must experience a very large negative acceleration, relative to your body, or increase the distance in which you can go from initial velocity at impact, to final velocity. This is observed in crumple zones. More rigidity removes that much more distance, and causes larger negative acceleration. An object that absorbs motion makes no sense.