Matt Damon admitted that the scene where Mark was getting emotional upon hearing Commander Lewis' voice was genuine. The other actors had wrapped and gone home, and their pre-recorded voices were actually being played to Damon from inside his spacesuit. When Damon began to think about how his character had been all alone on Mars for two years, alongside how he was only hearing pre-recorded voices of his co-stars who had already finished their scenes, he began to tear up. Ridley Scott was so impressed with Damon's performance, that he only did one take of the scene, which was used in the film.