http://video.google.com/videoplay?docid=-7427067542845351261&q=penn+and+teller+bullshit
In this episode, freely available on Google above, they introduce David Horowitz as a peoples' hero at the 18:24 mark. ("Get'em Dave!") The show is about how colleges are controlled by left-wing Nazis.
The Chomsky-bashing starts at the 19:47 mark, and again at 25:02 -- Noam appears, was gracious enough to give them an interview, he seems in good spirits, and they proceed to try to demolish him, mostly off-camera, away from him, in their studio.
-B.