"Not much," she said with a shrug, tilting her head back to look at the clear sky as she spoke. She wasn't sure she liked this abrupt and strange woman. Perhaps she would have to make a run for it. Could be fun. "It's some kind of pocket... thing. Apparently people from all over time and space come here and are stuck until they stumble back out again, at which point we won't remember a thing about this dimension. At least, that's what Jack Harkness said. I'm not entirely sure how much to trust him but it seems to be about right."