Select Menu Animation
At the FBI Warning screen, press [1] on your remote control for the Alien Sacrifical Chamber background or [2] for the Predator Wrist Panel-Computer background.
Bonus Interview (unrated edition only)
On disc two, go to "Marketing" and highlight "HBO Special". Press [Right] to see a facehugger icon appear in the upper-right corner. Press [Enter] and you will see Tom Woodruff tell his crew about his acting days as the alien creature.