Continuity mistake: When the Rancour grabs Luke, as the shot ends, Luke is holding the bone with two hands. In the next shot, he's holding it with only one hand. (00:25:20)
Continuity mistake: When Yoda is lying in bed, the creases in the blanket over him keep changing between shots.
Continuity mistake: When the droids enter Jabba's throne room, a three-legged R2-D2 rolls out on the floor. In the next shot, the droid no longer has his third leg deployed.
Revealing mistake: When the Tydirium shuttle is flying toward the Imperial spaceships, there's a frontal shot of it and a strange thing appears near the shuttle for a few frames. It's not the kind of marks that appears on an old film, or a special effects box. It's like a problem with the matte painting.
Revealing mistake: In the shot where Vader throws the Emperor into the pit, the Emperor is obviously a puppet, because he doesn't move at all. (01:52:15)
Continuity mistake: After Luke leaps up to the catwalk during the lightsaber duel, Vader's left shoulder is more covered by his cloak than in the previous shot of him.
Audio problem: When the group in the shuttle Tyderium is waiting tensely to see if the clearance code is accepted, Han says, "They're not going for it, Chewie." If you look closely, you can see that when he stops talking, his mouth is still moving. (00:54:00)
Continuity mistake: When Han and Leia kiss after the Death Star explodes, after Wicket shows up, Han's hand is on the back of Leia's head. In the next shot, his hand is on her arm, and Leia's thumb is touching his jaw, which it didn't do in the previous shot. (01:59:30)
Continuity mistake: In the Emperor's throne room, the existence and arrangement of several of the canisters on each side of the lift/elevator changes between shots, several times.
Continuity mistake: When the droids are hiding behind a tree before R2-D2 shoots off to help Han and Leia, the background changes twice. (01:35:45)
Continuity mistake: During the final battle, when some moving ships explode, the fire and the debris suddenly stay stationary.
Continuity mistake: When Leia frees Han from the carbonite, the light shining on the walls and floor keeps changing. For example, watch the light on the right side of the carbonite block.
Continuity mistake: During the battle against the Death Star, right before the Emperor gives permission to fire the Death Star, Wedge says, "Red Three, Red Two, pull in." Another pilot answers, "Got it", but it is neither Red Two nor Three, but Green Leader. (01:36:25)
Revealing mistake: If you watch closely (or play it in slow motion) when the scout trooper punches Han, you can see that the troopers hand never actually comes into contact with is face. (00:55:45)
Continuity mistake: When Chewbacca gives Han a hug in his prison cell in Jabba's palace, he initially puts one arm around him, but as the shot changes both Chewbacca's arms are around Han.
Continuity mistake: When Luke throws a scout trooper off of a speeder bike on Endor, the trooper mysteriously hits a tree back first, but he should have hit the tree face-first. He only rotated across his horizontal axis.
Continuity mistake: After the Ewok takes off on the speeder bike, Han says, "You stay here, we'll take care of this." Leia turns and she can be seen with a very large smile, even showing her teeth. When the camera instantly cuts to a different angle of the scene, Leia is no longer smiling, displaying a deadpan look.
Continuity mistake: In the fight scenes on the skiffs with Jabba the Hutt's men, the skiff that Han and Chewie are on is hit with a laser blast and Han falls over the edge feet first, yet in the following scene he is hanging upside down with Chewie holding his feet.
Revealing mistake: When Luke somersaults over up to a platform above him when fighting Vader, If you look at the hair of Luke jumping, you will notice that the stunt double's hair is much more blonde than Mark Hamill's.
Continuity mistake: When Han is planting explosives in the bunker, he says, "Throw me another charge." and places the charge on a crossbeam. In the next shot, the charge is on a different part of the ceiling. (01:47:00)
Answer: Yoda. When he was departing for Cloud City to save his friends in the previous film, he promised Yoda that he would return to Dagobah to complete his training.
Phaneron ★
OK. But I thought he was talking about the holeish thing in his hand since he covered it up when he said it. I must have misunderstood it.
The hole in Luke's robotic hand reminds him that he got that robotic hand in the first place because he lost his duel with Darth Vader at Cloud City - a confrontation Yoda warned him he was not ready for.
TonyPH