Several of the batlike creatures flap their wings loudly against the cockpit window of the Falcon. Inside, Threepio shudders at their presence.
THREEPIO: Ohhh! Go away! Go away! Beastly little thing. Shoo! Shoo!
Han looks around the strange, dripping cave.
HAN: Wait a minute...
He unholsters his blaster and fires at the cave ground. The cavern begins to shake and the ground starts to buckle. Chewie barks and moves for the ship, followed closely by Leia and Han. The large wings of the Mynocks flap past them as they protect their faces and run up the platform.
As soon as Han and Leia are on board, Chewie closes the main hatch. The ship continues to shake and heave.
HAN: All right, Chewie, let's get out of here!
The Wookiee heads for the cockpit as Han, followed by Threepio, rushes to the hold area and checks the scopes on the control panel. Leia hurries after.
LEIA: The Empire is still out there. I don't think it's wise to...
Han rushes past her and heads for the cockpit.
HAN (interrupting): No time to discuss this in committee.
And with that he is gone. The main engines of the Falcon begin to whine. Leia races after him, bouncing around in the shaking ship.
LEIA (angry): I am not a committee!
COCKPIT: Han is already in the pilot's seat pulling back on the throttle. The cave-quake has greatly diminished.
LEIA: You can't make the jump to light- speed in this asteroid field...
HAN: Sit down, sweetheart. We're taking off!
As the ship begins to move forward, Chewie barks. He notices something out the window ahead. Threepio sees it too.
HAN: I see it, I see it.
Suddenly, a row of jagged white stalagmites and stalactites can be seen surrounding the entrance. And as the Falcon moves forward, the entrance to the cave grows ever smaller. Han pulls hard on the throttle, sending his ship surging forward.
THREEPIO: We're doomed!
LEIA: The cave is collapsing.
HAN: This is no cave.
Leia's mouth drops open. She sees that the rocks of the cave entrance are not rocks at all, but giant teeth, quickly closing around the tiny ship. Chewie howls.
SPACE SLUG MOUTH: The Millennium Falcon, zooming through the monster's mouth, rolls on its side and barely makes it between two of the gigantic white teeth before the huge jaws slams closed.
CAVE ENTRANCE: The enormous space slug moves its head out of the cave as the Falcon flies out of its mouth. The monster tilts its head, watching the starship fly away.
The Falcon races out of the asteroid crater and into the deadly rain of the asteroid storm.
DAGOBAH: With Yoda strapped to his back, Luke climbs up one of the many thick vines that grow in the swamp. Panting heavily, he continues his course - climbing, flipping through the air, jumping over roots, and racing in and out of the heavy ground fog.
YODA: Run! Yes. A Jedi's strength flows from the Force. But beware of the dark side. Anger... fear... aggression. The dark side of the Force are they. Easily they flow, quick to join you in a fight. If once you start down the dark path, forever will it dominate your destiny, consume you it will, as it did Obi-Wan's apprentice.
LUKE: Vader. Is the dark side stronger?
YODA: No... no... no. Quicker, easier, more seductive.
LUKE: But how am I to know the good side from the bad?
YODA: You will know. When you are calm, at peace. Passive. A Jedi uses the Force for knowledge and defense, never for attack.
LUKE: But tell me why I can't...
YODA (interrupting): No, no, there is no why. Nothing more will I teach you today. Clear your mind of questions. Mmm. Mmmmmmmm.
Artoo beeps in the distance as Luke lets Yoda down to the ground. Breathing heavily, he takes his shirt from a nearby tree branch and pulls it on.
He turns to see a huge, dead, black tree, its base surrounded by a few feet of water. Giant, twisted roots form a dark and sinister cave on one side. Luke stares at the tree, trembling.
LUKE: There's something not right here.
Yoda sits on a large root, poking his Gimer Stick into the dirt.
LUKE: I feel cold, death.
YODA: That place... is strong with the dark side of the Force. A domain of evil it is. In you must go.
LUKE: What's in there?
YODA: Only what you take with you.
Luke looks warily between the tree and Yoda. He starts to strap on his weapon belt.
YODA: Your weapons... you will not need them.
Luke gives the tree a long look, than shakes his head "no." Yoda shrugs. Luke reaches up to brush aside some hanging vines and enters the tree.
TREE CAVE: Luke moves into the almost total darkness of the wet and slimy cave. The youth can barely make out the edge of the passage.
Luke sees a lizard crawling up the side of the cave and a snake wrapped around the branches of a tree. Luke draws a deep breath, then pushes deeper into the cave.
The space widens around him, but he feels that rather than sees it. Very little light peers into the darkness. It is very quiet here. Then, a loud HISS!
Darth Vader appears across the blackness, illuminated by his own just-ignited laser sword. Immediately, he charges Luke, saber held high.
He is upon the youth in seconds, but Luke sidesteps perfectly and slashes at Vader with his sword. Vader is decapitated. His helmet-encased head flies from his shoulders as his body disappears into the darkness.
The metallic banging of the helmet fills the cave as Vader's head spins and bounces, smashes on the floor, and finally stops. For an instant it rests on the floor, then it bursts open from an explosion.
The black helmet and breath mask fall away to reveal... Luke's head.
Across the space, the standing Luke gasps at the sight, wide-eyed in terror. The decapitated head fades away, as in a vision.
Meanwhile, Yoda sits on the root, calmly leaning on his Gimer Stick.