Jayne: I don’t understand why we didn’t leave that sumbitch in a pool of his own blood. 

Mal: We’d be dead. 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 — lemmie do the math here — nothin’, and then nothin’, carry the nothin’…

Firefly – Episode 1 – “Serenity”