Ok I found the video somewhere else, it does not look intentionall, it looks like that Shields still does not know anything about striking, that he is very uncomfortable and scared while staying in the pocket. It looks like he is swinging his hand in the zone to prevent GSP from coming in with a solid shot. It looks more intentional in slow mo, than it does in real time. Decisions are made in real time so I dont think it was intentional. It was Shields flapping around to make up for his sucky standup.