bobw answered my question on the primer forum thread... Basically the way the box works is that time moves alot faster while in the box. In the minute that the box was on, the weeble did about 650 round-trips - one minute backward in time, one minute forward in time, until the box is turned off. The weeble experienced about 1300 minutes in the box. But the weeble can't leave the box, whereas a human can. So to travel back in time, I step into the box as it's turning off. In my first trip back in time, I go back as long as the box has been turned on (say 4 hours). At this point I exit the box and it's 4 hours earlier. If I stayed another 4 hours in the box, then exited, I would have spent a total of 8 hours in the box and "objective time" would not have moved at all. But as soon as I leave the box, I create a new "timeline" - the "original" copy of me is still living out the day (hasn't gotten in the box yet), so he's staying out of the way so he doesn't meet me (his twin). If he does, who knows what will happen - maybe something will freak him out and it'll convince him not to get into the box that day, in which case my timeline is no longer going to take place... that's actually exactly the effect that Abe and Aaron are trying to exploit when they discuss punching out the corporate dude that they don't like - Abe and Aaron go punch out the dude, then go back in time, and stop their original selves from doing what they were about to do. Anyway, if you get back in the box before the box has fully shut down, then somehow you "complete the circle" and there's only one of you left. If you don't, there are more copies of you running around. Wicked :-) Read More...