Total protonic reversal? Small price to pay for an instantaneous 3D scan of a building's interior. That's what the backpack pictured above delivers, a project from UC Berkeley students and faculty Matthew Carlberg, Avideh Zakhor, John Kua, and George Chen. The pack contains a suite of laser scanners and positional sensors that enable it to capture images of building interiors as a fleshy assistant roams their halls. Those images can then be automatically pieced back together to create a 3D representation. We're having visions of instant Doom II WADs but the real boon here could be an extension to Google Maps where you could not only get a Street View but also an interior view. You know, really scope out that little Thai joint before you schlep yourself all the way downtown.