The Mission: Impossible star recently chatted with Empire about the opening sequence of the John Woo-directed Mission: Impossible 2, which saw the actor climbing a rock face in Moab, UT. What wasn’t known until now was that Cruise completed the shot while battling a serious injury.

Tom Cruise told Empire magazine that he breathed in his own carbon dioxide while filming a grueling action set piece for the upcoming “Mission: Impossible – The Final Reckoning.” The sequence finds Cruise’s Ethan Hunt underwater exploring the wreckage of a submarine.

Tom Cruise is no stranger to difficult stunts, as he's proven time and again in the Mission: Impossible franchise, but he might have faced his biggest challenge to date in the upcoming movie Mission: Impossible – The Final Reckoning.

Mission: Impossible star Tom Cruise details the major risk he took filming an underwater scene in the upcoming blockbuster.

Rocket K/Getty Images for Paramount Pictures Tom Cruise pushed the limits while doing his own stunts for Mission: Impossible — The Final Reckoning. In an interview with Empire magazine, Cruise said he

The 62-year-old action hero is famed for insisting he does as much of his stunts as possible - no matter how dangerous they are. And returning to his role as Ethan Hunt in the upcoming Mission: Impossible - The Final Reckoning he pushed himself to the absolute limit.