[He's not at all surprised that Mercy is one of the first to reply to him - it's exactly what he would've expected. The good doctor's not fond of letting people fuck up royally, and, well, announcing he's going to take down a serial killer isn't one of the brightest thing he's done recently.]

Well if it ain't me, who's gonna do it? Maybe someone else'll step up, but for the time being I don't see anyone else who's got the time.

[He makes a face at her nagging. Gosh, why can't he just slowly kill himself in peace? He does at least extend the courtesy of stubbing out his cigar, but he doesn't look particularly pleased.

And then-]

What? Why? The arm works fine! [He raises it and points at the camera, as if to say "see? it's perfect!".]