I am suprised they don't wear chest and shoulder protectors like a motocross racer. Most every sprint car driver I have asked has said they have been nailed in the chest and shoulders from cars passing to the inside on a turn.
Understandable and true, but you need to pull your belts as tight to your body as you can get them. I have seen Bobby Allen pull his shoulder belts down then wiggle himself down in the seat more and pull them tight again. Belts stretch as it is and the more play between your body and the belt the more they stretch. Montieth's head hit the steering wheel and broke his helmet a few weeks ago at the Grove if you can imagine that stretch. Very lucky as that is exactly what a base skull fracture comes from. I know they are not the most popular thing with drivers but a Hans or similar device is important. My grandson has a small Hans for Cage Kart racing and I wouldn't catch him running without it.
I agree with the belts.
The shoulder protection I was thinking of was not up on the shoulders, but actually more of an upper arm guard. I have seen just a few cars have a panel that slides into place once the driver gets in to protect him from that big opening.
I would think if someone really wanted to they could come up with some chest protection that went under the firesuit or went on after the belts were pulled tight.
Back to the rock screen, wasn't it Van May that lost an eye to a rock?