Anthony Russo: The hardest thing to do as an actor is to act without dialogue, and Sebastian Stan did such an incredible job with this character. Gave him so much life and complexity and texture without a lot of dialogue. You really see his wheels turning in this scene.
Joe Russo: Well, he conveyed incredible menace just through movement for a good sixty minutes in the movie. And that is the hardest job in acting. It’s always very difficult to convey emotion without speaking.
- Captain America: The Winter Soldier Blu-ray Audio Commentary