When I was a kid I'd have autistic fits and my parents would stand and laugh at me and say, "Look at yourself, Scott, your making a fool of yourself," that was pretty humiliating. I'd be punching myself in the face and banging my head off the floor.
I guess around this same time my dad used to like to take my hands and punch me in the face with them and say, "Stop hitting yourself Scott. Why are you hitting yourself Scott?" My dad thought this was a riot, but it was fairly humiliating, considering that I had this problem where I had fits and punched myself in the face.