Friedrich settles down into a chair, and, perhaps most shocking of all, actually starts to look like he's about to be serious about something. "I don't see why they would have all these chevrons just to make us confused. They would have made it for themselves to use, not really thinking about the future. I think. That being said, if you need to manage time travel, I think, and maybe Klaus could further clarify," Friedrich adds looking to Klaus, "that you would in fact need two mechanisms to control the flow of time. Just like a balloon has one air pressure inside and another outside, I suspect time might work in a similar fashion. But I would defer that to our physicist."