Originally Posted by chephy

There is no proof that it saved you from death.

And what does the doctor know? He's a doctor, not a physicist/applied mathematician who can model the impact and accurately established the forces involved and what their impact on the brain would have been. Anyone making such a conclusion just from the way helmet looks is making wild uneducated guesses. Lots of doctors do that, I'm afraid - in fact, a lot I've met were surprisingly dim for a profession that requires impressive academic achievement to get into. Truth is, even though they are often thought of as high-powered intellectuals or something, they are just relatively high-level technicians. Their opinion on helmets is no more expert than yours or mine, but they present it as if they actually knew something.