It's like being a horse jockey. Their goggles get mudded up, can't see a thing. I was going full tilt down a mile long straight. It was raining and spitting snow at Ft Sumner NM. Hit a really cold pocket of air The bubble shield on my Bell Helmet fogged up. Could not see a thing. Could not get my fingers inside the shield to wipe the fog away. Ripped it off and gritted my teeth.
Now days it really is grueling the way you pull so many G's in a corner that you need to build up your neck muscles.
I could go on.