The last scene was a very clever editing job...

It was a joke. Watch the last scene very closely if you recorded the episode: The one where it looks like they are rehearsing Ozzy's famous "I love you all, but you're all f**king mad" scene. It's a very clever editing job. They just -added- different background voices to the scene, and cut in a few very brief shots of one of those things a crew member clicks before a scene. Look closely. It's obvious that the shots of the scene clicker are not actually in front of Ozzy, they were just edited in, along with a couple of voice tracks of supposed crew members. You never actually see crew members talking to Ozzy--in fact Ozzy never actually reacts to what they are saying. You just -hear- them. Again, very clever editing job. If you have the DVD of the first season, you'll know that at least two different cameras shooting from different directions are usually around. So they would have had additional footage of that scene as well, which you also see very briefly.