How does J. G. Ballard use imagery in Crash?

Imagery:

"I began to understand the real excitements of the car-crash after my first meeting with Vaughn. Propelled on a pair of scarred and uneven legs repeatedly injured in one or other vehicle collision, the harsh and unsettling figure of this hoodlum scientist came into my life at a time when his obsessions were self-evidently those of a mad-man." Chapter 2, pg. 19

"During my first hours in Ashford Hospital all I could see in my mind was the image of us locked together face to face in those two cars, the body of her dying husband lying between us on the bonnet of my car. We looked at each other through he fractured windshields, neither able to move." Chapter 2, pg. 20