Yeah was thinking they could generate some sort of electric field or vibration that would propel itself through the air. Again this is more of a fun sketch, would need to go back in and work all that stuff out if i took it further.
Ben, I am absolutely sure you will land a very impressive job in a major title movie of the dimensions of Avatar or the Matrix, soon. Your work is simply too evocative, too compelling, too deep not to play a major part in the grande vision of where humanity is headed in the next few decades. This stuff is REAL.