It’s a small thing that is easily overlooked until you can’t do it. Backing up the car. Walking and talking beside someone. Crossing the street. Shaking your hair out. Looking at the mole on your shoulder. Shaking your head “no”. People watching. Watching a tennis match. Reacting quickly to a sudden danger. Addressing the stewardess on an airplane. All of these things would be tougher without the ability to turn my head. Did I miss any?