Originally Posted by Kryptonian Warrior
I personally think it could go either way. Incomplete CGI or it's because he is flying straight up. If he were flying at an angle, I would expect some flapping but since is he flying at the speed of sound and going straight up, I wouldn't think it would flap at all because it has so much resistance against it. I'm no physics expert though, so I could be completely wrong. Sounds good in my head though. Lol
For the angle and the speed he is flying, I think it looks perfectly fine.