Take a look at this pic.....and imagine me driving, and a rear impact so hard that it sent my baseball cap from my head to the rear deck (back window). Lilpooky was the front seat passenger. We had no idea what happened. The guy that hit me found my hat for me. $10k damage to the rear end, 2 months off work, and back surgery.
Roadmaster'* DON'T have crumple zones. They're built like a freaking truck. In impact WILL hurt. (no, my airbags didn't deploy....only a frontal impact on a Roadmaster will do that, but we were driven into the back of the car in front)