I think with the Dean VS Dean scene, the fact that he snapped and was yelling all these things completely opposite to what he would normally be saying and thinking is supposed to show this inner denile he has kept hidden all his life. Dean would NEVER say some of those things he said. I don't truly believe he blames his father for his mother's death, but he's angry about what happened to him and to his life and he is lashing out, saying stuff he doesn't necessarily mean because his other self is bringing to life things he knows about himself but doesn't want to admit. That he scared of dying, that perhaps he is too much of a "good soldier" who has blindly followed his father for years, that he is this pathetic creature who doesn't have a life of his own. (I dont think he's pathetic, but I think *he* thinks he's pathetic).

Anyway, I liked the scene personally.