Loki: Your world in the balance, and you bargain for one man? 
Natasha Romanoff: Regimes fall every day. I tend not to weep over that, [bad word] .. or was. 
Loki: And what are you now? 
Natasha Romanoff: It's really not [bad word]  I've got red in my ledger, I'd like to wipe it out. 
Loki: Can you? Can you wipe out that much red? Drakov's daughter, Sao Paulo, the hospital fire?... Barton told me everything. Your ledger is dripping, it's GUSHING red, and you think saving a man no more virtuous than yourself will change anything? This is the basest sentimentality. This is a child at prayer... PATHETIC! You lie and kill in the service of liars and killers. You pretend to be separate, to have your own code, something that makes up for the horrors. But they are a part of you, and they will never go away!... I won't touch Barton. Not until I make him kill you! Slowly, intimately, in every way he knows you fear! And then he'll wake just long enough to see his good work, and when he screams, I'll split his skull! This is MY bargain, you mewling quim! 
Natasha Romanoff: You're a monster! 
Loki: [laughing] Oh no, you brought the monster. 
Natasha Romanoff: So, Banner... that's your play. 
Loki: What? 
Natasha Romanoff: [on [bad word]  Loki means to unleash the Hulk. Keep Banner in the lab, I'm on my way. Send Thor as well. 
Natasha Romanoff: [to Loki] Thank you for your cooperation