Yah, I read up on the Alcubierre drive on the Wiki, and I'm pretty sure that was it. (Thanks, Control_Chair!) Still, cheating. :-) Also, the requirements of creating the field pretty much take it out of normal space time by many definitions of normal. For one, the region cannot be entered and left by any known means, making it likely the necessary means would not be consistent with remaining in "normal" spacetime during the transition (as we know most "normal" ways to move around, I think).