Near the start of the film C-3PO and R2-D2 arrive at Jabba's palace, and C-3PO just gives the door a tiny knock before claiming nobody is in. Also, C-3PO tries to explain to a security droid they are to see Jabba, but the security droid just laughs in a sarcastic manner making C-3PO think they aren't allowed in, and attempts to leave only for the door to open. Threepio's utterly delighted "I don't think they're going to let us in, Artoo!" is the icing on the cake.
C-3PO is told by a droid supervisor that the last protocol droid was destroyed after he offended Jabba, and C-3PO is given a glimpse of what will happen to him if he displeases Jabba.
For some reason, Salacious Crumb the creepy-little monkey thing always gets a chuckle out of This Troper. Maybe it's because he looks and acts like a demented Muppet?
It's Original Trilogy Star Wars. For all intents and purposes, he is a demented Muppet.
Salacious Crumb laughs after Han said "Good, I hate long waits", as if it was a joke. If Kowakian Monkey-Lizards are sapient enough to know things, then he knows that Han will be slowly digested over a thousand years, so will indeed have a long wait before he finally dies.
It makes you wonder if the song is really called that in-universe, considering everyone believed the Jedi betrayed the Republic.
The title may be ironic, for all we know the band is singing about how much the Jedi sucked.
Maybe it's about the Jedi being dumb as rocks?
Along those same lines, "Lapti Nek" from the original version. You've got a space lounge band playing a really cheesy-sounding disco song, then you catch a glimpse of the lead singer, Sy Snootles — a grotesque alien with a pair of red lips on the end of a long snout, singing in a feminine voice that in no way matches her appearance.
In the middle of the Jabba's Palace sequence, for no apparent reason whatsoever the scene suddenly cuts to outside the place during a sunset where a giant frog-like animal uses its tongue to lap up a smaller creature, and then lets out a large belch that echoes, and then the scene cuts back to inside the Palace.
When Leia is first brought to Jabba, the gangster licks her as part of a kiss, much to her disgust, and it makes it more funny when C-3PO claims "I can't bear to watch", implying the off-screen scene is pretty disgusting and disturbing.
Han: I can't see, pal! What's going on? Chewie:[growling] [Luke's rescuing you.] Han: Luke?! Luke's crazy! He can't even take care of himself, much less rescue anybody! Chewie:[growling] [No, it's okay, he's a Jedi Knight now!] Han: A j— A Jedi Knight!? Oh, I'm out of it a little while, and everybody's got delusions of grandeur!
Han's reaction to his imminent execution within the Sarlaac.
C-3PO: His high exaltedness the great Jabba the Hutt has decreed that you are to be terminated. Immediately. Han: Good, I hate long waits. [Salacious Crumb laughs]C-3PO: You will therefore be taken to the Dune Sea, and cast into the Pit of Carkoon, the nesting place for the all-powerful Sarlacc. Han: Doesn't sound so bad. C-3PO: In his belly, you will find a new definition of pain and suffering . . . as you are slowly digested over a . . . thousand years. Han:On second thought, let's pass on that, huh?
You can tell that Luke and Han don't think very highly of themselves when they talk like this.
Han: Together again, huh? Luke: Wouldn't miss it. Han: How we doin'? Luke: Same as always. Han:That bad, huh?
C-3PO: R2! What are you doing here? R2-D2:[Beep, beep, beep] C-3PO: Yes, I can see you're serving drinks!
Han's line "Threepio! You tell that slimy piece of worm-ridden filth he'll get no such pleasure from us!" is much funnier in the novelization, where he begins saying it while unknowingly facing the wrong way, then Chewbacca turns him around to face the sail barge so he can finish it. And immediately following, Han asks Chewie "Right?" Chewie then shakes his head and growls an obvious, needs-no-translation "No."
When Luke announces, "Jabba, this is your last chance. Free us... or die!" It just sounds like an empty, pathetic threat when he says it, even though he and his friends end up laying waste to Jabba's court. Before that Jabba tells them they're free to beg for their lives, which they refuse to. So they probably settle for getting a laugh from an idle threat.
The battle above the Sarlacc pit. Despite being outmatched and having a blind crewmember, the rebels manage to beat all of Jabba's fully-armed mercenaries by basically letting gravity take its course. That Sarlacc must have been really happy!
Boba Fett, the bounty hunter that spent the majority of The Empire Strikes Back being set up as an arch-enemy to the non-Jedi characters, is beaten when a blind Han Solo bumps into him, setting off his jetpack which sends him crashing into a barge and dropping straight into the sarlacc's throat. Then comes the belch, just to seal his humiliation.
Possibly not intended to be funny, but Lando's scream when the Sarlacc grabs his leg.
A visually impaired Han trying to aim a blaster at the Sarlacc's tentacle, which is around Lando's leg and dragging them all into the pit, while the skiff is tipping over.
Lando: Oh wait, I thought you were blind! Han: (Original Version) It's alright, trust me. Don't move!/(Special Edition) It's alright, I can see a lot better now. Don't move! Lando: A little higher! Just a little higher!
It's even better in the comic adaptation, in which it's quite clear that Han is aiming the gun at Lando's head.
Yoda: "When 900 years old you reach, look as good, you will not, hmm?"
Yoda's death was tragic, but one funny moment in the midst of it. When Luke asks him if Darth Vader really is his father, rather than tell him at first, he insists he needs to rest. He was literally trying to die quicker rather than tell Luke.
Han's advice to Chewie when they're trying to avoid suspicion from the Imperial patrol before landing on the Forest Moon of Endor.
Han: Keep your distance, but don't look like you're trying to keep your distance. Chewie:[roars an objection in Shryiiwook] Han: I don't know! Fly casual.
Once again, Threepio gets the best line when Luke and Han have to search for a missing Leia.
C-3PO:[to R2] And you said it was pretty here...
The idea that R2 can appreciate the scenery is hilarious all on its own.
Han: Great, Chewie! Great! Always thinking with your stomach!
The whole "C-3PO is an Ewok god" sequence, especially when the Ewoks misunderstand Threepio's instructions to free his friends. Made even funnier when Luke starts laughing. He's been playing The Stoic the entire movie.
Dude, there is nothing more funny than watching a bunch of Ewoks bowing to C-3PO. Except perhaps when they run away in fear of his "magic".note (i.e. Luke using the Force to levitate the throne that Threepio is sitting on.)
Luke: Threepio, tell them if they don't do as you wish, you'll become angry and use your magic. C-3PO: But Master Luke, what magic? I couldn't possibly— Luke:[calmly] Just tell them.
C-3PO: You see, Master Luke? They didn't believe me. Just as I said they wouldn't.
Threepio's reaction to this is much funnier. Especially when he screams for help to be put down while the Ewoks cower in fear.
Luke: Thanks, Threepio! C-3PO:[dazed] I... never knew I had it in me.
Not to mention, his panicked shouts and gesticulations probably really sold the illusion to the Ewoks that their deity was royally pissed-off and about to rain down upon them with. . . something.
It apparently starts to go to his head later:
Han: Wait here. C-3PO: I have decided that we shall stay here.
Threepio shines in this film, especially after it's revealed he can talk to the Ewoks
Luke: Do you understand anything they're saying? C-3P0: Oh, yes, Master Luke! Remember that I am fluent in over six million forms of commu— Han: What are you telling them? C-3P0: Hello, I thinků
And if you carefully watch when Threepio reveals that the Ewoks think he's a god, Luke is desperately trying not to start laughing. And when Threepio says that he's not programmed to impersonate a deity, Luke really struggles not to crack up.
Han was about to strangle C-3PO for not being much help, only to be backed off by the devoted Ewoks. One of them even tries to hit Han, which is nothing but a little pat on the shoulder.
Han: My mistake. He's an old friend of mine.
Han trying to talk his way out of becoming the main course of the banquet, even as the Ewoks pile up the firewood beneath him, singing cheerfully the whole time. When talking doesn't work, Han's reduced to (pathetically) attempting to blow out an approaching Ewok's torch.
When the gang is made "part of the tribe", one of the Ewoks gives Han a hug. Chewie gets multiple hugs, much to his dismay. Han tries to look on the bright side.
Han: Well, short help is better than no help at all, Chewie.
Wicket is clinging onto Han's leg. Likely comforting him for being frozen in carbonite.
Plus, some of the ways the Ewoks take out the Imperial troops. For instance, a speeder bike is lassooed by the steering vane and whirls around into a tree, the pilot screaming all the while.
C-3PO narrating the whole Star Wars story to the Ewoks, complete with sound effects. The Ewoks' reactions are priceless, especially the infants flinching away during the scary parts. Now remember Threepio in A New Hope, saying to Luke that he's "not very good at telling stories. Well, not in making them interesting, anyway."
Poor Threepio, no respect at all.
C-3PO: He says the scouts are going to show us the quickest way to the shield generator. Han: Good. How far is it? Ask him. [3PO turns to ask, Han pulls him back] Han: We need some fresh supplies too. [3PO turns again; Han pulls him back again] Han: Try and get our weapons back. [and again] Han: Hurry up, will ya? Haven't got all day!
And Han turns him around again as the camera cuts away.
One of the Ewoks hijacking a speeder bike to lure the Imperial sentries away from the bunker; hearing him squeal as he barely keeps control of the bike before ditching it is quite amusing, as is the wild goose chase he got the goons on while Han makes his next move.
Han: Not bad for a little furball — There's only one left.
Han then goes up to the last guard and taps him on the shoulder, prompting the guard to chase him straight into half a dozen heavily-armed Rebels. Clearly, Han's learned a thing or two from the little escapade aboard the first Death Star.
Han tries to open the bunker door at Endor by fiddling with the panel's wires. Cue "I think I got it. I got it!" Only to have a massive set of blast doors close over the previous one. Han looks at the wires with a face that says "God, I'm such an idiot!"
When the rebels are sneaking into the shield generator on Endor, Luke tells Han to be careful so he is not seen. Han responds with a cocky, "Hey. It's me!" The look Luke and Leia exchange is priceless.
...And then he almost immediately steps on a twig and gives away his position to the scout troopers.
On a similar note, the enormously smug grin Han gives the Imperials after he tricks them into opening the door.
Casting Gag: That officer is none other than sound effects maestro Ben Burtt, who brought the Wilhelm back into prominence. The scream you hear was his own [pretty good] attempt at replicating it.
In a deleted scene in the bunker on Endor, when the famous commander says "You Rebel Scum!", in the deleted scene, Han mouths "Scum?"
Chewie and two other Ewoks swinging on a vine to hijack one of the Imperial walkers. Chewie's Tarzan Yell sells it.
At one point during Luke and Vader's rematch, Luke decides to jump onto the platform above him, or "the high ground" so to speak. To anyone has ever watched Revenge of the Sith, this moment becomes darkly humorous as Vader opts to throw his lightsaber instead of making the same mistake. It's not hard to imagine Vader thinking "I'm not falling for that again!"
When Luke tells the Emperor "Your overconfidence is your weakness" near the end, the way Palpatine delivers the rebuttal "Your faith in your friends is yours" always makes it seem like he might as well have been saying "Yeah, well, your mother." Robot Chicken had the same thought.
The newly-added NOOOOOOOOOOOO! during the scene with the Emperor torturing Luke and Vader killing him for the Blu-Ray releases. Evidently Lucas didn't have enough confidence in his viewers to understand the desperate conflict within Vader through us looking at his emotionless mask and having the dramatic music play, and decided that we needed some kind of indication that Vader was going to kill Palpatine and not, say, lift him up to change a lightbulb.
After the Super Star Destroyer Executor crashes into the Death Star, the Rebels on Admiral Ackbar's flagship Home One start cheering wildly. And if you listen carefully, you can hear someone exclaim, "DIE, DICKHEADS!" Also hilarious is the reactions of Admiral Piett and a second observing officer on the Executor's bridge just before the A-wing crashes into it.
Han's reaction when Leia breaks the news about Luke being her brother. It's hilarious as his expression goes from "What the hell?" to "YES!!"
What really sells it is you know he was thinking about that infamous kiss in The Empire Strikes Back. His face was pretty much the same face everyone else had thinking about that kiss in hindsight. Leia must have realized this, which is why she kissed him.