If you had to spend 10 days in total isolation, what would you think about? Maybe how Aquaman can control whales?

"The Martian" released a "behind the scenes" video of the Ares 3 crew preparing for their mission to Mars. The crew members are interviewed by a psychologist after a 10-day isolation test. And what they thought about did in that time — and how they respond to the psychologist — is illuminating.

Matt Damon's astronaut, Mark Watney, pondered that deep question about Aquaman's abilities. Watch to see what Jessica Chastain, Michael Peña, Kate Mara, Sebastian Stan, and Aksel Hennie had to say.

Watch the video.

In "The Martian," Watney is left alone on Mars after being presumed dead and the Ares 3 crew leaves the planet. He has to use some ingenuity to stretch his meagre supplies and find a way to contact Earth to try to find a way to return home. The movie opens October 2.

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