Grant, well spotted I have just seen the Super Cup cars have nothing to stop your arms flying out the window whilst rolling.
Years ago a friend of mine rolled at Lydden and as a reaction put his arm out the window and held onto the roof!!
He left imprints of his fingers on the roof but did not break them.
We showed him lots of sympathy by painting the outline of his fingers in red on the roof
I have actually been considering a window net for next year anyway.
OK Grant, what racing are you thinking of doing