Goddamn potato-cam. I thought we were past the days of blurry video like this. I share the skepticism others have already posted. Some of my observations:

He doesn't appear to be afraid or ashamed of being called out like that. He keeps turning around and responding to the megaphone lady. The way he raises his arms seems to imply a challenge like "Yeah, what are you going to do about it?" but we can't hear what he's saying so it could just as easily be him saying "What! Are you crazy, woman?!"