Clint Barton: Have you ever had someone take your brain and play? Pull you out and stuff something else in? Do you know what it's like to be unmade?
Natasha Romanoff: You know that I do.
Nick Fury: Yes, we were going to build an arsenal with the Tesseract. I never put all my chips on that number, though because I was playing something even riskier. There was an idea, Stark knows this, called the Avengers Initiative. The idea was to bring together a group of remarkable people to see if they could become something more. To see if they could work together when we needed them to, to fight the battles that we never could. Phil Coulson died still believing in that idea. In heroes.
Thor: No! (Tries to catch Loki, but it's just his duplicate that disappears)
Loki: Are you ever not going to fall for that?
Tony Stark: You're a laboratory experiment, Rogers. Everything special about you came out of a bottle.
(A moment later...)
Steve Rogers: Big man in a suit of armor. Take that off, what are you?
Tony Stark: Genius, billionaire, playboy, philanthropist.
Steve Rogers: You think Fury's hiding something?
Tony Stark: He's a spy. Captain, he's "the" spy. His secrets have secrets.
Nick Fury: I don't know about that, but it is powered by the Cube. And I would like to know how Loki used it to turn two of the sharpest men I know into his personal flying monkeys.
Thor: Monkeys? I do not understand.
Steve Rogers: I do. I understood that reference.
Tony Stark: Raise the mizzenmast. Jib the topsails. That man is playing Galaga. He thought we wouldn't notice, but we did. (covers one of his eyes) How does Fury even see these?
Maria Hill: He turns.
Tony Stark: Sounds exhausting.