When I was about 13 years old, I saw a man in what appeared to be a lab jacket and a bowler hat in my living room. Before I could tell for my father it just dissappeared. Well we lived in a large house and my great grandfather lived downstairs and after explaining to my parents what I saw they took me down to his apartment and in the spare bedroom behind an afghan my long since passed great grandmother had made was hanging on the wall was a door I didn't know about. They opened the door and there was a coat rack with a doctors jacket and bowler hat on a desk. Turns out a doctor had killed himself there in the 20's or 30's or something. Scared the shit out of me.