Hidden clip
Enter the "Special Features" menu and press [Right] to highlight a hidden set of dynamite. Press [Enter] to view a clip of Yosemite Sam exploding.
Same options
Enter the "Special Features" menu, then watch the "Theatrical Trailer" option. After that go directly to the "Collection Trailer" option and they will be exactly the same. This will work only once or twice. By the next time you play the disc, the "Collection Trailer" will have returned to normal. This only works when you play the disc for the first time.