I don't know if you would consider this relevant to that, but i was knock unconscious in my pro stocker from tire shake with my head bouncing around inside a funny car style cage. So to bounce around in a street rod with a seat belt on with your unprotected head hitting a roll bar, I don't know, every accident is different. I think if you have the perfect wreck under the perfect circumstances you could live under any situation. But unfortunately that isn't the case, most of the time
Ken