Yeah, he said something about them being tested with the strongest attacks they could find? [He gives a slight shrug.] Like I told him, must be some pretty impressive trains they've got. I can see why you think they're cool! Still, I think they'd have some trouble with motion sickness, at the very least. [With all that dizzying flight in the TARDIS he does, he'd probably be a natural at dealing with battle on the Subway, but there are others to worry about. The idea's just a bit unthinkable at the moment.]

A staircase! Well, that's convenient, isn't it? [Can't be too far, then! He continues walking, looking at the panels as he goes.] Now, the letter from Nacrene... It said something about reports made by trainers who visited this place. Do you know anything about what they could have been reporting?