She isn't sure how to respond to that statement. It is impossible, of course, for them to be anywhere but Earth because Earth is all they have. The human race and all living things.

Then again, this city with its cruel laws, unusual population and strange occurrences such as the bus ride she has just experienced - well, how can any of this be explained?

She appreciates that he is holding her hand in both of his because it helps to ground her. Not meaning to stare at him and wanting to say something, she continues to do the former and seems incapable of doing the latter.