Rolled my autograss mini, flipped over about 6 times on the screen/bonnet, it had a cage, I was strapped in, suit, helmet, still scary, can still see it all in slo-motion when I think about it, and this was years ago...
I guess the one thing I learnt from racing was even the smallest bump at 30 HURTS, makes you more cautious on the roads, especially when you're surrounded by glass and with just a poxy seat belt holding you in...
What effect did the roll cage have ?
Hard to remember, it did stop the A pillar (from what I could see) coming any farther into my face.. the shell was kind of alright, the main part of the shell that is, wings were a gonner (well would be if it was for road use), shell was kept more rigid from the cage so it all pulled out well, but I wouldn't have wanted to re-live that without a cage fitted... Have a memory of watching the mud hit my face and seeing the A post fold up against the cage like tinfoil... Did land back on all four wheels, facing the opposite direction!
Getting back to the pits and hearing my older brother ask if I was hungry then offering me a roll, didn't see as funny back then as it does now...
This kind of roll, is a bit different than hitting something head on, or rolling and smashing into something solid, like you would be more likely to do on the roads... I kinda just bounced over, rather than crumpled into something HARD, and I was well strapped in, protected and supported.
My brother hit the re-inforced fence when he was a junior at about 25mph coming out of a dust cloud on a bend, and the whole front of the mini caved in, whiplash in this kind of crash even with protection was still apparent...