Took a soccer kick to the head when I was grappling a patron in a bar. Lost sight in my right eye, which is permanent, and it pinched a nerve in my neck that made my left arm atrophy. So I had a muscular right arm, and a bone skinny left arm for a year as I had to built it up after the neck swelling went down. My left shoulder and arm are still smaller, but not so noticeable. It all aches, after all these years.