I raced superbikes for several years. That ended with a head injury. It doesn't matter how careful you are. Your potential demise is out of your control. But I was in it to win and that's a test of wills as much as it is skill and concentration. It's exhilarating when it works. A high like none other. Sometimes it's hard to not be distracted by how good it felt comming off the last turn - except preventing getting passed in the next one happens NOW.