Why, he wondered, did the lunatics always flock to him. Couldn't they be obsessed with someone else? No, it was always Batman whose attention they wanted and others who suffered for it. He was tired of it. Here, with no asylum and no police, there wasn't even a good way to end it for long, a deficiency he'd have to remedy in some fashion as soon as possible.
"It has nothing to do with the moon. And I told you: I'm very busy." The Batman voice was rougher than usual because he really was annoyed; part of him had hoped he could avoid this sort of thing here for at least awhile longer. Not to mention he really was busy.
For the moment, he waited, weight balanced to be able to dodge without thinking about it at the first sign of movement. Better if he could talk him out of it.