Wash: If Kaylee doesn't give us some extra flow from the engine room to offset the burn-through, this landing is gonna get pretty interesting. Mal: Define "interesting". Wash: "Oh God oh God we're all gonna die"? Mal:[over intercom] This is the Captain. We have a little problem with our entry sequence, so we might experience some slight turbulence, and then... explode. [to Wash] Can you shave the vector? Wash: I'm doing it, it's not enough. Mal: Well, just get us on the ground. Wash: That part'll happen pretty definitely!
"We're gonna explode? I don't wanna explode!"
You can't leave out how all that starts out: We have an epically beautiful shot of Serenity on land approach, badass music blasting over the roar of atmo entry (the one time where Space Is Noisy is justified), and...**WHUMP** Oops, there goes the primary buffer panel.
Also can't forget how that comes up again right at the end, just as the reborn Serenity goes full burn...and loses a tail piece.
When fleeing from the Reavers:
Jayne: I won't get et! You shoot me if they take me! [Mal aims pistol squarely at Jayne] Jayne: Well, don't shoot me first!
As River fights in the bar:
Fanty: Do you know that girl? Mal: I really don't.
Kaylee after Simon confesses his feelings for her:
Simon: In all that time on the ship... I've always regretted... not being with you. Kaylee: With me? You mean to say... as in sex? Simon (flustered): I... mean to say. Kaylee: To Hell with this. I'm gonna live!
Mal: You want to run this ship?! Jayne: Yes! Mal:[thrown off] ...Well, you can't!
Those grenades Mal didn't want Jayne to take along... one Reaver ship later:
Jayne: "Boy, it sure would be nice if we had some grenades, don't you think?"
A guard at the company the crew is robbing asks for a password. Jayne fires his machine gun.
The guard then discussing where he wants to be shot (so he can avoid punishment for allowing the robbery to take place), with him and Mal debating the merits of a bullet through various areas of human anatomy.
Mal: The leg is good, it'll bleed plenty, and we avoid any necessary organs. Guard: I was thinking more of a graze... Mal: Well, you don't want it to look like you just gave up.