I think after all of the uproar over The Passion (which, after seeing the movie [which wasn't very good], I found to be totally unfounded), I think its his way of moving past all of the craziness around that movie; poking a little fun at himself while having fun doing it. From everything I've heard he's a known praticaly joker, this seems to be his way of saying, "Hey, its just the same old me".