She nodded, "We call it The Crash. When everything came crashing down. Something happened to the petrolium, made it more like phosphor, explosive when it came into contact with good old air. It was like a virus that only effected oil-based products. And Pretties... Okay." She pulled him to a stop easily enough, "Look at me, I mean really look. You probably won't be able to place it, so I'll tell you, my face is symmetrical. Perfectly symmetrical, and I've got a whole lot of other things due to the Operation, stuff that's like... genetically programmed into humans to respond to with 'wow, that's pretty', and I probably shouldn't even be telling you, but I figure this is a different universe than mine, and even if it isn't, like I said, ancient history."