Rob Reiner: “Jack Nicholson himself – I’ll never forget this – when we did the courtroom scene, when Jack has that famous monologue (‘You can’t handle the truth!’) we did that scene from maybe 15 different angles before we got to him and Jack was off camera for all of these and he said he wanted to do his last. In other words, he wanted us to come around and shoot him after having shot everybody else because it would give him a chance to keep working at it.
“Now, in doing his off-camera performance for everybody else’s reaction he did it full out – every single time, full out.
“And I said, ‘Jack, save a little – save it for the time you’re gonna be on camera….’ And he says:
“‘Rob, you don’t understand. I’m an actor. I love to act, and this is a rare time when I’ve gotten really good material so I can act.'”