If you like an hour of pain do partake in a Cycle Cross race. Or do as I did have a short walk around a nice park/golf course while looking at people in pain. I have come to the conclusion that Cycle Cross have been invented by the cycle manufacturers in an attempt to make more money. When you are a max heart rate, thinking that you are about to die, and your chain jumps off. You will not check your bike over as you will at home in the garage. From the amount of chain vs cassettes interferences I heard today, I know the LBS will be busy tomorrow.