He blinks at the description. "...No, but it sounds like that's a world you've been to before.

"I think some of the Travelers described it as a post-apocalyptic world. There was some disaster that happened years ago - I'm not sure what, nobody would talk to me about it - and I guess a lot of the world's not suited for living in anymore. We were in a walled city while we were there - or I guess they called it a college."