It was a nice cool Saturday. My dad and I Were going to McDonalds to get dinner. When we got up to the drive-through I saw a man come out of his car with an oxygen tank in hand, hooked up to his nose and around his ears. The worst choice of the whole entire ride, I made direct eye contact with the man who looked like he was in his late sixties. He smiled and waved I turned away and looked at the cashier in the window and the man walked over to our car, and I still looking at the cashier, I see him next my window waving and smiling, missing most of his teeth. I told my dad the man was standing on my side of the car. He said, not to look at him. So I didn't.he knocked on the window to get my attention waved and told me to roll down my window, but I rolled my window up even more. So as I drive away the man is standing in the drive-through blocking all the cars seeming psychotic. We saw a stool on the side of the road when we drove back to buy cigarettes for my father and mother, it was apparently the man's stool. This man seemed like he was supposed to be in a mental hospital or rehabilitation. He was not safe around others, police were called and they never found the man...