Fair enough to feel sorry for someone's pain, but if you can do your back just hopping out of the car it goes to show how tricky it is to say what's the cause of an incident of this type.
You should have sued the car manufacturer for your loss of earnings and the mental and physical anguish you experienced.
Just joking, of course, but how far away is that from the nav bag experience, notwithstanding that that happened in a workplace?