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.
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.]
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 funnier in the novelization, when Obi-Wan wakes up, he's starting upside-down at Anakin's butt. At least, he thinks it's Anakin's butt, he hasn't really made a study of it, especially at this range and angle, and he has no idea how he wound up here in the first place. The description does a wonderful job of relating Obi-Wan's semi-concussed muddledness.
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 slime! 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.
In the novelization, General Grievous considers the fact that he's abandoning Palpatine and disobeying orders for the first time ever...
As he entered his customized pod, he reflected that he was, for the first time in his career, violating orders: though he was under strict orders to leave the Chancellor unharmed, Palpatine was about to die alongside his precious Jedi. Then Grievous shrugged, and sighed. What more could he have done? There was a war on, after all. He was sure Lord Sidious would forgive him.
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.
The Legends novel Labyrinth of Evil made it even funnier, by describing just what that "business" was. Obi-Wan unintentionally got high and Anakin helped him finish off a group of battle droids that were attacking him.
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.
At one point in the Obi-Wan vs. Grievous fight, Obi-Wan kicks the General in the shin. This beingGeneral Grievous, Obi-Wan comes to regret his decision very quickly.
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...
Prolonged Beat as Obi-Wan blatantly stares at Padme'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.
C-3PO's reaction to hearing that he's going to have to undergo a mind-wipe.
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 films imply, and the EU states outright, that Obi-Wan already knew the whole time.
From the novelization, Obi-Wan gets in a beautiful bit of snark against Grievous:
Grievous:You Fool!! I was trained in your Jedi arts by Count Dooku himself!
Obi-Wan: What a curious coincidence. I trained the man who killed him.
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?