Movie Soundtrack

Several of the menu screens on the disc contain complete tracks from the movie soundtrack. For example, the Language selection menu screen contains Bjork's 'Amphibian' in its entirety

There's nothing here

Go to the second page of the Special Features selection screen and there is a menu entry called 'Don't enter here, there's nothing here'. Entering it will display a static page with the message 'There is nothing here, press enter to return'