The Doctor hums thoughtfully as his eyes get a far-off look about them. "Someone said that once about a hidden street that I found. That was right before all the running, and screaming, and dying happened."

Clara's death (even if he can't remember that it was specifically her) is a 'not good' memory (at least as much of it as he can remember). Thanks for that. He shakes himself back to the present.

"Still, I suppose 'more favourable' is always better than 'less than favourable.'"

He nodded as if he had made a decision.

"Well, No sense in staying here all day, then. I take it you know the way?"