Well, in my estimation it definately hinges on your enviornment. Preternatural or not, if you're in a dense urban area, it becomes nearly impossible to anticipate every little thing that can jump out at you. I know when I hit the trail, I have little or no need at all for a brake, but I've had well more than one occasion that on the way home cutting through the city a car door has unexpectedly popped open or a person steps out from between two parked trucks. Having a brake saved my life, or theirs. No one is psychic.