They stand there on that rooftop and watch each other circle. The spider has closed in on the fly, but the fly still has a few tricks up his sleeve.
"I could kill Rich Brook and bring back James Moriarty." Sherlock counters.
Moriarty looks honest-to-God disappointed. He puts his face in his hands and lets out a low moan. "No, no, no... This is too easy, this is too easy." He stands, gets up in Sherlock's face. "There is no key code, doofus!" The last word comes out in practically a scream.
He was wrong. He was wrong, and Moriarty thinks that he's an idiot, and, damn, he's surprised by how much that hurts.