Posted via the PriusChat mobile app.[/QUOTE] I'm almost 60... and I had a back injury (ruptured disc) 8 years ago. Many times in the morning, getting out of my bed, my back is really stiff, and it takes me an hour, and 3 or 4 ibuprofens to be able to stand up straight, without pain. Yet for some reason, I never experience any of that when I sleep in my car ? Weird right ?