This exchange during Ethan's debrief on the botched rescue mission of Agent Farris.
Ethan: Mr. Brassel, it's unacceptable to question Agent Farris's competence... Brassel: It's unacceptable that chocolate makes you fat, but I've eaten my share and guess what?
Benji speculates on what "The Rabbit's Foot" is, made all the funnier thanks to Simon Pegg's delivery:
Benji: I'm assuming it's a code word for something he's about to sell to an unspecified buyer, for 850 million dollars by the way, or maybe it's not a code word. Maybe it's just a really expensive bunny appendage.
While prepping Ethan to take Davian's place, Luther warns Ethan about taking his relationship to the next level, noting that the secret-agent life isn't ideal for a marriage.
Luther: In our job, there's always going to be something between you and a woman. Always. Ethan: Luther— Luther: Dishonesty poisons everything— Ethan: I think I need to tell you something— Luther: Stop talking. This isn't about you, Ethan. Whoever this girl is, you're gonna end up messing with her life too. Don't do it. Ethan: Jules and I got married two days ago. [long beat] Luther: Congratulations! Ethan: Thanks!
Ethan and Zhen get "Davian" away from his translator by feigning a seduction, much to the translator's annoyance.
Translator: Her hotel has laundry service and she'll happily take care of it. Ethan-as-Davian:[smiles] You want to wash my shirt? What are we going to do in your hotel room while I'm not wearing my shirt? [Zhen speaking in an obviously flirtatious manner] Translator:[suppressing an eyeroll] 'She'll think of something'.
When Ethan-as-Davian gets in the Lamborghini with Zhen and Luther opens the manhole below the false console of the car.
Ethan-as-Davian: What's up? Luther: Nothing. What's up with you? Ethan: Nothing. [climbs down into the hole]
As Ethan escapes IMF HQ, he jams the walkie-talkies by holding down the talk button, disabling Brassel's ability to communicate with security. As Ethan comes out of the cover building, he pins the walkie-talkie next to a radio playing "We Are Family" on his way to freedom. Brassel is in disbelief as the song comes over the walkie-talkies, turning to his partner stating, "You Have GOT to Be Kidding Me!." The music even briefly follows Ethan out of the building as runs away, offering a humorous dissonance to his daring dash for freedom.
Benji's disapproval when Ethan calls him for help while Ethan is wanted by the whole CIA.
Benji: I'm gonna lose my citizenship for this, you know.
"Maybe we can share a jail cell, you know? If this all goes tits up, which it will. The location of that number is Shanghai. There, I just told you. Shanghai. I just aided and abetted an enemy of the state. Fantastic. Thank you."
How Ethan kills Davian at the end. Davian gets run over by a truck... somehow leaving behind only his shoe. A hilarious Anticlimax if there ever was one.
Ethan hurriedly trying to instruct Julia on what to do to revive him, while also trying to teach her how to use a gun, while also fighting the pain of a ticking bomb in his head.
"Turn the switch on and off. Don't forget the off."
"I'm going to die unless you kill me!"
[Julia absentmindedly points the gun at Ethan while listening to him] "DON'T point at me!!"
The entire climactic battle - where everyone involved but Julia is killed or knocked out, including Ethan - happens in, or right outside of, a doctor's office.
What's Julia's response to Ethan revealing the acronym of the IMF (Impossible Mission Force)?