Target Fixation is a Bitch
Two people in my riding club have gone down due to target fixation within the last few weeks. For any of you unfamiliar with the term, target fixation is a nasty habit that's hard to break. It's the tendency to lock your vision on either a stationary or moving object, like the rocks on the side of the road or the car in front of you. Your bike tends to follow your eyes, so target fixation sometimes leads to hitting the very thing you're fixated on.
Breaking that habit is a skill that is learned and developed. Look where you want to go, not at the thing you're trying to avoid. Sometimes it's so damn hard to peel your eyes off the target and look up the road, but it's a necessary skill to survive the motorcycling game.