Mal: Can't get paid if you're dead.
Jayne: Can't get paid if you crawl away like a bitty little bug neither. I got a share of this job. Ten percent of nothin' is, let me do the math here... nothin' and a nothin', carry the nothin'...
Serenity
Mal: How come you didn't turn on me, Jayne?
Jayne: Money wasn't good enough.
Mal: What happens when it is?
Jayne: Well... that'll be an interesting day.
Mal: Imagine it will.
Serenity
Jayne: Time for some thrilling heroics.
The Train Job
Jayne: You know what the chain of command is? It's the chain I go get and beat you with 'til you understand who's in ruttin' command here! Now we're finishing this deal, and then maybe, maybe we'll come back for those morons... got themselves caught... and you can't change that by getting all... bendy.
The Train Job
Mal: Nice shot.
Jayne: I was aimin' for his head.
The Train Job
Jayne: Tell you what I think. I figure that fellow we run into did everyone on board. Killed 'em all. Then he decided to take a swim, see how fast his blood would boil out his ears.
Bushwacked
Jayne: "Dear Diary: Today I was pompous and my sister was crazy. Today we were kidnapped by hill folk, never to be seen again. It was the best day ever."
Safe
Jayne: Six men came to kill me one time. The best of 'em carried this. It's a Callahan full-bore auto-lock. Customized trigger. Double cartridge thorough gauge. It is my very favorite gun. [...] I call it Vera.
Our Mrs Reynolds
Jayne: That's why I never kiss 'em on the mouth.
Our Mrs Reynolds
Jayne: Let's not be excluding people. That'd be rude.
Ariel
Jayne: What're you gonna tell the others?
Mal: About what?
Jayne: 'Bout why I'm dead.
Mal: I hadn't thought about it.
Jayne: Make something up. Don't tell 'em what I did.
Mal: The next time you decide to stab me in the back, have the guts to do it to my face.
Ariel
Jayne: I'll be in my bunk.
War Stories
Jayne: Well, Jayne ain't a girl! She starts in on that girl's-name thing, [reaches into his pants] I'll show her good 'n' all, I got man parts!
Trash
Jayne: Girl's a mind-readin' genius, can't even figure out how to eat an ice planet.
The Message
Jayne: Mal! Looks like we got some imminent violence!
Heart of Gold
Jayne: And if wishes were horses, we'd all be eatin' steak.
Objects in Space
Jayne: I once hit a guy in the neck from 500 yards with a bent scope. Don't that count upstairs?
Book: Oh, it'll be taken into consideration.
Jayne: You made that sound kinda ominous.
Objects in Space