I can remember walking to the lake in the 1930’s accompanied by another psychiatrist who had always lived in the city. There were a lot of trees around the lake. I walked through very comfortably, and he disgustedly, again and again, angrily commented on the branches of the trees, striking him unexpectedly, knocking his glasses off. So I had to tell him, “You learn how to walk through underbrush and trees, it’s different than walking on bare land and bare sidewalks. You balance your BODY differently .. . and you automatically respond to a branch out of the corner of your eye without noticing it and you alter your body movements so that the branch will not impede your movements.