Have you not considered that he is merely playing it up to hide his fear of Batman in reality?
Are you telling me, that i'm afraid of Batman even though I'm not aware of it?
Why not look at it this way: If I told you that Batman was behind you right now what would be your reaction?
If I told you something was behind you, wouldn't your first reaction be to look at it?
Who are we to know these things?
May I just say that this game turned out to be much more boring than I thought?
Who is going to stop you?
If anyone was going to stop you, would it be a terrapin with a top hat?