do people seriously not remember. aaargh

1. 4x04 Metamorphosis - Dean finds out about Sam and Ruby and Sam using his powers to exorcise demons. Dean immediately punches Sam in the face and starts yelling at him about it. “Do you even know how far off the reservation you’ve gone? How far from normal, from human?”
2. 6x06 You Can’t Handle the Truth - Sam tells Dean he doesn’t know what’s wrong with him, why he doesn’t feel anything. “I don’t know what’s wrong with me. I think… I need help.” Dean immediately beats him unconscious.
3. 7x03 The Girl Next Door - Sam is suffering hallucinations and dissociation due to Hell trauma. He goes off on his own to find Amy. Dean doesn’t know where he went. When Sam comes back Dean punches him in the head when he opens the door, hard enough that he falls backwards. “New rule, you steal my Baby, you get punched.”
4. 10x23 Brother’s Keeper - Dean is trying to convince Sam of why he should die. Sam hits him, Dean hits back. He knocks Sam to the ground, and continues punching him in the face. From the transcript: “Dean throws Sam to the ground. As Sam tries to get up Dean punches him viciously in the head. Dean looks at Sam coldly and punches him two more times as Sam tries to get up.”