It seems to create an imbalance in the surrounding EM field. Then, I presume, it would "fall" down the "side" of the field, or better yet, "surf" the EM field "wave" it created between its inside and its outside.
And if you don't like that theory, well, I'll just come up with another one! LOL!
Pretty good speculation for a skeptic. It helps me picture the possibilities of the device. Thanks.
And BTW, I am also a skeptic. But I do find this interesting.