So many wonderful touches to this. I don't know why, but I really liked this: “Shouldn’t have to handle himself,” Winchester says. “He’s ten years old. He shouldn’t have to handle anything like this.” I think it might be the irony. At 10, Dean was dealing with stuff like that all the time, but seeing someone else doing it makes him angry. I also really like the demon's MO. It's nothing we've seen before, but it seems even more evil than just a straight out soul swap.