Hey, I just got a brand new Wii and I bought Call of Duty:Black Ops. When its loading or while im playing it, it makes a 'rattling' noise. Is this normal or should I be worried? It also does this for a few secs when its loading a world from New Super Mario Bros. Here is a link to the youtube video:http://www.youtube.com/watch?v=IIl_SBrPvGs Thanks for anyones help!