After working 2,000 people into a full-throated lather for the better part of an hour, Don Barris needs the audience to settle down a little. The excitable hype man for ABC's "Jimmy Kimmel Live" (picture Michael Chiklis on a steady diet of carbohydrates and Adderall) is trying to becalm the woots and cheers of a Wednesday afternoon crowd that's been enraptured by the likes of Marty McFly and Sen. Bernie Sanders because, as he puts it, "We're going to shoot a commercial now."