Move Fast, Stay Low
Unfortunately, the Doctor was quite oblivious to that effort. Centuries of an excellent memory (give or take) and strong sense of direction (mostly) often kept him from considering what it may have been like for anyone else.
He stopped at an intersection, looking left and right - then turning, lips pursed, at the gently phrased but rather thorny question. “Other lifeforms? Personal experience, my dear. You see … ” He leaned forward a little offering a kindly smile, “I am one. Now, let’s be moving along. You see these pipes running overhead, here? I’m rather curious to see where they lead.”
... so it looked like her attention was going to be split between watching for threats, trying to memorize their path, and keeping track of the Doctor, which was going to be incredibly-- well, fine, okay, at least she wasn't going to be bored, right?
Right.
Especially given his answer, although, all things considered, there wasn't any reason to be too worried about it, since Intel's stat report suggested that no more than 57% of post-contact extra-terrestrial lifeforms were actively trying to kill humans, so the odds were that this guy was on their side, or at least not dangerous. Theoretically.
So she turned her attention to the pipes. "What's so interesting about them?" They didn't have any unusual markings-- that she could see, anyway.