I remember a column by Peter Egan about attending a bike race wherein he referred to the riders having "an interesting and varied assortment of limps and gaits".
Yeah, the good tracks are designed to let you crash and not have anything solid stopping you. Daytona isn't one of them, which is a main reason why I quit CCS. Just about everyone crashes, at least a couple of times a year. It takes its toll. I am more worried about the number of times I had someone yelling me back into consciousness than the lumpy bones.
There is nothing that requires more, zen like concentration though. Sailing can, but it is more difficult to maintain it. Trying to keep the boat moving in zero to light shifty wind almost comes close in a weird sort of way.
I miss motorcycle racing.
Don't forget, opening round of MOTOGP is on tomorrow. Much more fun to watch than Formula "Un"