He""s a dog.He""s an Animagus." [This was the first of three amazing transformations to be revealed in the course of the action.]The dog Grim was actually Sirius Black in disguise - he could turn into a ferocious dog at will.Harry attacked Sirius to save his friends, but Remus Lupin burst in and disarmed Harry with his wand.Chewie was confined in a prison cell with C-3PO""s disattached parts.The Wookiee tried to reassemble and reactivate he droid, by placing its head on its torso, although at first, he had the head on backwards.In fact, the film has been called a black-and-white version of the famous Selznick film hat was in its pre-production stages.He liked the great marquee potential of Rocky""s dramatic nickname for their match-up: APOLLO CREED MEETS THE ITALIAN STALLION.[Note:There are five birthdays in the film (in order): (1) the Dawn of Man himself; (2) Dr.Floyd""s daughter; (3) Astronaut Frank (his parents sing him Happy Birthday via radio); (4) computer HAL""s "operational" birthday; (5) the Birth of the Starchild.