The downhill is a dangerous dance that leaves little margin for error. The split second decisions and actions cannot be made by the mind. We must resort to something much more instinctive. We must let out the animal in us. We must let it snarl and howl or we have no chance for survival.
Contemplation is for hikers.
Bikers don't need brains. Thinking is great for calculating taxes, but not so good for finding a way over that log in the trail. The brain is likely to think, Hey, this is dangerous. I don't know if my HMO will cover head injuries. The animal in us, however, has no such qualms.