"That makes sense because you're not pulling off of anyone else's power. You're just using what's inside of you," Sam nods. It gets him wondering if Ruby still pulls off someone's power or if she's down to using what she's got inside of her. "You should be more careful." He doesn't hold what the Doctor did against him. He can't when he weighs it against the things he's done but he does know that Tara shouldn't risk herself for someone like the Doctor. Or someone like him for that matter.