Bluto said:
After reading your post, I watched that very scene a dozen times but can’t see it… Vader just nods as he says “No”, and then again when he says “I” - all looks natural enough to me, including the movement of the cape in the wind. Can you be more specific about what looks wrong to you? I’m intrigued!Bluto
yhwx’s response was enough to help solve that mystery. Check it out:
I’m pretty sure it’s something intentional. I think I read about it somewhere.
JEDIT: https://storify.com/tvaziri/the-rock-and-roll-moment-in-empire