After (crash-)landing in the Invisible Hand, Obi-Wan doesn't even let his fighter come to a stop before ejecting and leaping into battle. In a notable role-reversal, the normally Hot-Blooded Anakin carefully lands and unbuckles his flight harness, makes sure R2 has ejected, and only then joins the fight.
It's not the first time they switch roles in their cold masterheated apprentice relationship. In Attack of the Clones, it's Obi-Wan who jumps through a skyscraper window to chase after a machine after an assassination attempt on Padmé, undoubtedly risking his life, and it's Anakin who then runs to his jet and tries to back him up. Ironic.
Obi-Wan and Anakin being stuck in an elevator. Anakin's response is to cut a hole in the roof and jump out.
Obi-Wan:(sighs) Always on the move.
Obi-Wan then does the sensible thing by calling R2 to activate it. Except R2 then sends the elevator plummeting at breakneck speed, flooring Obi-Wan and forcing Anakin to grab onto the nearest ledge for dear life. Obi-Wan's fading shout of "R2!" as the elevator drops from under Anakin's feet is just icing.
Anakin and Obi-Wan take time out from the opening battle to comment on R2's performance. For about five seconds they sound like his parents, with Anakin being the protective one and Obi-Wan asking why he's always the bad guy.
Obi-Wan: Well, R2 has been— Anakin: Ehh, no loose wire jokes. Obi-Wan: Did I say anything? Anakin: He's trying. Obi-Wan:[defensively] I didn't say anything!
Battle Droid: Hands up, Jedi! [Anakin, hanging by his hands inside an elevator shaft, gives the two Battle Droids an "Are you serious?" look]
There is also:
Battle Droid A: Drop your weapons. [Obi-Wan and Anakin pause and look behind them] Battle Droid A: I said drop them... Roger. Battle Droid B: Roger, roger. [Anakin and Obi-Wan slice the battle droids to bits.]
Anakin, Obi-Wan, and Palpatine's brief exchange right before the Jedi sparred with Dooku.
Palpatine: Get help, you're no match for him. He's a Sith Lord! Obi-Wan: Chancellor Palpatine, Sith Lords are our speciality! [Dooku flips over the railing and lands away from the Jedi. He begins walking towards them.] Obi-Wan: This time we will do it together. Anakin: ...I was about to say that.
Also, the Dramatic Irony of Obi-Wan telling Palpatine that "Sith Lords are their specialty." You can almost hear Palpatine thinking, "oh, really?"
When Obi-Wan regains consciousness while Anakin is carrying both him and the Chancellor, while hanging for dear life in an elevator shaft.
Obi-Wan: [wakes up] Uh... Wha! Ah! [Clutches Anakin for dear life] Anakin: Easy. We're in a bit of a situation. Obi-Wan:Did I miss something?! Anakin: Hold on. Obi-Wan: What is that? Anakin: Uh, oops. [Cut to an elevator heading straight for them.]
Even better in the novelisation, where Obi-Wan notices that yet again, Anakin has misplaced his lightsaber. When he tries to call this out, Anakin manages to throw it right back into his face. And then Palpatine winks at him, as if sharing the joke.
Obi-Wan: Oh Anakin, where is your lightsaber? Anakin: I know exactly where it is. [pointing at a battle droid] It's right there. Obi-Wan: How could you let this happen? Anakin: Hey, he's got your lightsaber too, you know. Obi-Wan: I really don't think that's the point. Anakin:This weapon is your life, Obi-Wan! Obi-Wan: Yes, alright, you've made your point.
Immediately after Anakin advises Obi-Wan to be patient and wait for R2's arrival. R2 promptly barrels into the hallway and brings about 40 other droids in tow, chasing after it. When cornered, R2 shocks the closest Super Battle Droid, which gets it kicked over like some trash can.
Anakin: I say patience. Obi-Wan:[clearly incredulous] Patience? Anakin: Yes. R2 will show up, and he'll deactivate the ray shields. [enter R2 careening in through a nearby doorway and crashing into the opposite wall] Anakin: See? No problem. [battle droids show up] Super Battle Droid: Don't move. [gets zapped] OW! [kick] Obi-Wan:Do you have a plan "B"?
One wonders if Obi-Wan's incredulity here is at least partly due to AnakinSkywalker advocating patience.
This is also funnier in the novel, with Anakin Tempting Fate by assuring Obi-wan that they can easily take out a security patrol made of "those skinny useless little battle droids". This is immediately followed by the arrival of "four of those skinny useless battle droids" - and eight destroyer droids, sixteen super battle droids, and two of Grievous' custom-designed, Jedi-killing MagnaGuard droids.
Obi-Wan: You were saying?
Virtually all the snark from the droids at the beginning of the film.
Right before they were captured, R2 ran away from super battle droids and hit a wall. And then he repeatedly shakes his head as if to avoid getting dizzy, like people do when they've hit their head on something.
When General Grievous snatches two lightsabers out of a poor downed battle droid's hands.
Battle Droid: You're welcome.
You practically feel the snark from that one. It passes by Obi-Wan and Anakin as it gives their lightsabers to Grievous and even says "Excuse me."
The scene where Anakin heckles Grievous.
General Grievous: Anakin Skywalker. I expected someone with your reputation to be a little... older. Anakin: General Grievous... you're shorter than I expected. General Grievous: ...Jedi scum! Obi-Wan: We have a job to do, Anakin. Try not to upset him.
Another moment in the novelization. General Grievous subscribes to the school of You Have Failed Me management, and he has an even smaller tolerance for failure than Darth Vader. Reality Ensues with he gets fed up with one last panicking crew member... and then realizes he just killed the last of his bridge crew.
Obi-Wan lopping off a MagnaGuard's head and casually walking away. His attempted badass exit is promptly ruined by the droid attacking him again, forcing Obi-Wan to turn back around and fend it off with an expression that screams "I just cut your head off! Why aren't you dead?!"
There's just something funny about a stampede of frightened Neimoidians and battle droids fleeing The Bridge while two Jedi are busy slicing everything to pieces.
Obi-Wan's total lack of reaction to everything going to hell during the battle of Coruscant.
"Not to worry, we are still flying half a ship."
Or this :
Obi-Wan: Can you fly a cruiser like this? Anakin: You mean, do I know how to land what's left of this thing? Obi-Wan: Well? Anakin: Under the circumstances, I'd say the ability to pilot this thing is irrelevant. Strap yourselves in.
For that matter, the entire Coming in Hot scenario, with increasingly large portions of the ship bursting into flames and/or falling off as Anakin brings them in for a forced landing. What should be a terrifyingly catastrophic scene (all of those chunks of the ship are falling over a very large city, and the ship itself takes out several buildings at the spaceport when it ditches) ends up being hysterically funny, thanks to Anakin and Obi-Wan's deadpan commentary.
Obi-Wan:[obviously winded] Another happy landing.
Palpatine's look of (feigned) annoyance at Artoo for cheering when they land.
When Anakin and Obi-Wan argue about how many times the young apprentice had saved his master.
Fridge hilarity when you realize that's a public transport Obi-Wan is about to board. A master Jedi, galactic peacekeeper, warrior monk with supernatural powers... is riding the bus.
When Palpatine tells about how Plagueis died (courtesy of him), you can almost hear his thoughts:
Palpatine: Darth Plagueis was a Dark Lord of the Sith, so powerful and so wise... Unfortunately, ["lol"] he taught his apprentice everything he knew, ["What an Idiot!"], then his apprentice killed him in his sleep. ["What the hell else did he expect?"]
The novelization has a number of darkly funny moments whenever Grievous is forced to put up with Nute Gunray. Most notably: "Grievous resisted his natural inclination, which was to boot the Viceroy so high he'd burn up on reentry."
General Grievous at one point delivers this line...
General Grievous: I am sending you to the Mustafar system in the Outer Rim. It is a volcanic planet which generates a great deal of scanning interference. You will be safe there.
What the line actually sounds like when delivered during the movie...
General Grievous: I am sending you to the Mustafar system in the Outer Rim. It is a volcanic planet [inaudible]You will be safe there.
Obi-Wan, immediately after killing Grievous with a blaster of all things:
Obi-Wan: SO uncivilized...
Becomes even funnier when you realize that he's not referring to Grievous, he's referring to the act of using a blaster. It's a callback to a line in A New Hope, in which he describes the lightsaber as a "elegant weapon" and subtly expresses disdain for blasters.
From the novelization: Obi-Wan and Yoda are considering how they will get back to Coruscant post-Order 66, and look dubiously at the small one-seater spaceship Obi-Wan arrived in.
Obi-Wan: I suppose... if you don't mind riding on my lap...
An incredibly Black Comedy example right before Anakin and Obi-Wan's final duel.
Anakin: YOU TURNED HER AGAINST ME! Prolonged Beat as Obi-Wan blatantly stares at Padmé's strangled and unconcious body mere feet away with a "The hell is he talking about?" expression. Obi-Wan: You have done that yourself.
When Anakin and Obi-Wan are fighting on one of the massive arms of the factory, and hot lava and rocks start raining down, they break off their duel momentarily to take cover. The annoyed expressions on their faces are amusing, but you almost expect them to resume snarking at each other. "This is another fine mess you've gotten us into!" "You're the one who brought us out here, Master!"
There's a moment in the Obi-Wan vs Anakin fight that's actually pretty funny, and it's completely silent. While Anakin and Obi-Wan are squaring off on a very thin pipe, one of the lava-collecting droids pops up. It looks at Anakin, then Obi-Wan, then pauses for a second. As if thinking "No way in hell is dealing with this part of my job description", it immediately flies away.
In a meta way, Anakin and Padmé desperately attempting to hide their relationship from Obi-Wan, and Anakin insisting that they can't tell Obi-Wan about it...when the theatrical films and The Clone Wars imply, and the EU states outright, that Obi-Wan already knew the whole time. And so did Captain Panaka. And Palpatine. And Rex. And Ahsoka. And Bail Organa. And possibly even Mon Mothma (Clone Wars Gambit implies that she might have suspected). And then there's all of Padme's staff. Great job keeping it a secret, guys!
The sheer fact that the last few letters of the above line is poking out of the page because it's so long.
Palpatine informing Nute Gunray and the other members of the Separatist Council that his new apprentice, Darth Vader, will be arriving soon to "take care of them." If the double meaning was intentional (and let's face it, it probably is) Palpatine has a warped sense of humor.
The novelization has a bit where Palpatine tells Anakin that he thinks the Jedi Council is making up this "Darth Sidious" in order to scare him. Funny enough, in a Dramatic Irony sense, but then the conversation following really takes the cake:
Palpatine: Do you know what I would do, if this "Darth Sidious" of yours were to walk through the door right now, and I could stop him killing you on the spot, do you know what I would do? I would ask him to sit down, and then I would ask him if he has any power he could use to end this war sooner. And if he said he did, I'd bloody well offer him a brandy and talk it out!
After Anakin protests that You Have GOT To Be Kidding Me, Palpatine shrugs and admits that yes, of course he is. After all, "what are the chances of an actual Sith Lord walking through that office door?"
The cut scenes are pretty funny as well. At one point Anakin and Obi-Wan flee into the fuel lines of Grievous' ship.
Anakin: We're safe for the time being. Obi-Wan:[incredulous] Your idea of safe is not the same as mine.
They then crawl to the maintenance shafts, and Anakin welds one shut to stop the fuel explosion they're waiting for.
Obi-Wan: Anakin, you still have much to learn. That will never hold. Fuel explodes, ruptures the hull and dents the welded shaft. Obi-Wan:[Beat] Alright, I still have much to learn.
There is also the longer version of them taking the elevator.
Anakin: R2, where are they holding the chancellor? R2-D2:[Beeps] Anakin:[looking at his comlink] No text. [hits comlink] R2-D2:[Beeps] Anakin: It's broken. Can you understand what he's saying? Obi-Wan: I'm not a protocol droid. Anakin: I'm pretty sure that beep [perfect binary] is down. Obi-Wan: I sense Count Dooku is above us. Anakin: Oh, yes yes yes, you're right. Beep [perfect binary] is up. [nods]. Obi-Wan: Ah. [starts for elevator] Anakin: I think... anyway, I agree. Up it is.
Followed by the above mentioned elevator scene with the battle droids and this gem:
Obi-Wan: Roger. Anakin: Rorr.
In a deleted scene between Padmé's Committee and Chancellor Palpatine, there's this dialogue:
Palpatine: You must trust me to do the right things, Senator. That is why I am here. Male Senator:Surely, you— Palpatine: I said I will do what is right. That should be enough for your... Committee.
The look that Padmé gives Anakin before she and the Committee leaves.
Followed up by this dialogue exchange between Palpatine and Anakin:
Palpatine: Their sincerity is to be admired, although, I feel as though there is more to their request than they are telling us. Anakin: What do you mean? Palpatine: They're not to be trusted. Anakin: Surely, Senator Amidala can be trusted? Palpatine: These are unstable times for the Republic, Anakin. Some see instability as an opportunity. Senator Amidala is hiding something. [Almost sing-song. Ish.] I can see it in her eyes. Anakin: I'm sure you're mistaken. Palpatine:[Sounding surprised] I'm surprised your Jedi insights are not more sensitive to such things?