A long time ago I watched a movie on TV. I don't know if it's from the 70's but I think so (at least it was old). There was a kid who was going to visit a relative and bring food to her, but he turned into a monster (with pink skin I think) and killed her. Later there were some men hiding in a room as this boy/monster came. I don't know why but one of the men went to the door and had his back against it. Then the monster broke through with its arms and took his head. I think I saw it on TCM or something. It was a long time ago and I still don't know what movie this is.