http://www.youtube.com/watch?v=a9WB_PXjTBo
The commercial in question.
http://www.youtube.com/watch?v=xhtYk5crxVY
Limbaugh's wonderful fucking commentary, and Fox's response.
Fox looks better in the response, but you can still see that he's got the same damn movement. Maybe he did go off his meds to show the disease in its full force, but he wasn't fucking faking.