Hi Texanzone
Look at reply 17 and click on what ever that thing is( im computer stupid) It'll take you to a long article on helmet testing. What I got out of it was that snell helmets are too hard for most crashes. I would have been better off with a cheaper, plastic outer shell in all my crashes, might not have been unconcious. All I have hit was pavement & dirt which is usually what you hit, espicially on the track , snell aproved helmets are for hitting sharper objects such as curb corners.
Please dont be pissed if Im all wrong, thats just the way I understood it.
About a mile after pic below, I hit leaves(I think) with hard front brake and woke up to folks saying do you need an ambulance, only 1 broke rib. Shoei x11 kept my beautiful face intact however.