I knew about the British rooftop scene, but they fooled me by doing it in the first episode. In any case, it had a very visceral shock effect. Loved the speech to the mirror at the end too, after 'ignoring' us the whole episode. I'm not going to binge, I'm going to savor.
Had mixed feelings about the subway scene (too State of Play) but it left my roommate and I in shock once we realized it wasn't some sort of dream sequence. Very well done to play it straight. Overall, season 2 is a fucking masterpiece.