It was less prank, and more making alterations so it was more obvious what had happened to Katrina. Once she came back, he smiled slightly. "I extended your potential maximum life by a minute, relative to everyone else. By which I mean I ejected you from the timestream. This had the side effect of making you vanish here too, allowing us to move around, hence why we appeared to teleport."<br/><br/>He smiled grimly, before explaining further. "And yes, it works like that, I have checked. And have used it to lose pursuers before."