I'm flying down the hill at 50 miles an hour. Trees blow past me as I rapidly descend in elevation. Suddenly, smack in the middle of the road, I see two grizzly bears. I slam on the brakes, skidding sideways on my road bike. Somehow, I maintain control and stop, a mere 20 paces away from the two grizzlies. Startled, one runs to the side of the road, but the other holds his ground.