In my case, it was proper positioning of the seat and safety belt that saved me. Many people lounge back and keep the belt slack around them. If you recline too far, you can slide under the belt. If the lap belt is too loose or too high, it can cause internal injuries in the abdomen or neck injuries if the shoulder belt is to high. I sit upright and have the belt low and snug across my hipbones, breastbone and shoulder. I position the headrest so the middle of my skull is in the middle of the headrest. I learned proper positioning when I was pregnant, and use the seat as a supportive cage like they are designed to be, and the belt to keep me strapped to it – lessons learned from auto racing technologies.