Hidden Sound Bytes
Hit the "9" button on your remote while in the menus. This will activate the little icons in the corners of various menu screens. Click on them to hear sound bites from the movie and from albums "Animals" and "The Final Cut".
Pictures from The Making Of...
Once in the menu screen, press the [Right] button until you are in the [Oddities] section, press the [Right] button again twice but in quick succession. You should get a menu where you can view pictures and images from the making of the film.