Peter, you're right that people in the US tend to whoop and cheer more readily than a European audience- except possibly at a football match. ;-) But it's all in fun. They're having a great time and it's sort of an expected part of that particular show. If you go along to be in the audience, you're expecting a highly-charged episode of screaming, jumping up and down, whooping. Without all that spectacle, it's just somebody opening case after case and hoping for a windfall. The cases, of course, are held by babes. ;-) So it's mindless pap dished up for people who sit vacantly in front of the TV all day (or when they're jetlagged at night ;-) )