As somebody who has been in a pretty bad car crash, the forces applied to the body on impacts are something difficult to comprehend unless you've experienced it.
An armrest may serve to help the belt prevent lateral motion. Sure, a few bones may be broken but it's better that some of the energy is transferred to the rest rather than just the seatbelt absorbing the energy which I imagine could cause some further abdominal injuries (one of the drawbacks of not having 3/4 point harnesses.
Last edited by nimsu1987; 30th October 2012 at 08:48.