Topher smiles at her sympathy. He's told her about his issues with consciousness, and she saw how well he can manipulate dreams. She can probably piece together that it was tough losing it, to suddenly not have that control. And then there were the implications of him not having his powers anymore, or not being useful, but all of that he hasn't really shared with her. And he can't possibly piece together an explanation while they're on the move. He's barely managing to hold a simple conversation at the moment. "How have you been, you know, besides that, then?"