"Do you really want me to go?" The Doctor raised an eyebrow, leaning against the bar beside the Master again, catching the hand the Master had reached out, just holding it. "Leave you alone to chase your thoughts in circles until the drums get too loud to think at all, only to act?" On impulse, and possibly foolishly. He knew the Master too well to think he'd do otherwise.
Not that he thought he'd do much better, or was doing much better. Being foolish enough to wind the Master up and let him down, and happily preparing to do it again, over and over... perhaps he'd been missing the Master a bit too much at the last regeneration. He suspected some of the insanity was wearing off onto him.