You know when you go to the theater and before the movie they play the Dolby Digital train? Or that THX intro with the cool robot? I love those things. And just recently I saw a cool one before the new Lord of the Rings movie..."You're listening to Dolby Digital in a THX theater". Very cool. Can you buy a DVD with copies of these things for listening at home? Just recently I found the Monsters Inc DVD had one of them (the THX robot with cows), but I'd like all these demos together on one disc. Thanks. Jonny K.