[SeanGAR]

From another site:

"Ok, so now that it's aired, let me say that to me as an audience member, it was clear to me that it was an act. During commercial breaks he and Dave would laugh and talk cordially, and when it was over he took his glasses off, turned and waved at the audience and chuckled and had a MUCH different demeanor. It was to say "this was a joke guys! Thanks for playing along."