I actually really enjoyed the dialogue between Michael Fassbender (Steve Jobs) and Jeff Daniels (John Sculley) in "Steve Jobs" in the hallway for this reason. They're genuinely frustrated (particularly Jeff Daniels) with each other, complete with stuttering and "unintentional" aggressive reactions and posturing. It's not a long take, and it's definitely fast call and response (Sorkin wrote it, after all), but it makes sense because these are thoughts that these two have been thinking about each other for years. The full conversation is worth watching. "Hunger" is one of my favorite movies, but "Steve Jobs" has one of my favorite exchanges between two actors.

To push back a little on the "Hunger" scene, I would just say that these two men are speaking their platitudes to one another. It may seem overly rehearsed, but the argument they are having is essentially their life-defining belief systems, slamming into one another. Like solidified mantras that fundamentally disagree, and of which they've spent their whole lives refining and defending. Think about your favorite debaters, some of which probably don't even have skin in the game, and how well they are able to deconstruct an opposing argument...except the discussion these two are having is literally defining what they believe is fighting and dying for. With that said, I agree that's hard to imagine this real conversation happening so fluidly.