Board Thread:Speculation House/@comment-4830106-20131108040231/@comment-4830106-20140321011554

Magnets, perhaps. The spinning might have something to do with the exact placement of attracting and repelling magnets. A 'Gauss Saber', if you will.

Of course, the fact that Penny is an android and would most likely be disrupted by magnets totally debunks this theory. I tried.