"I had to train myself how to breathe. There were times I would pass out physically; I was unable to get back into the cockpit," Cruise says.

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

Tom Cruise has been hailed a 'legend' by fans who can't believe what he went through while filming the latest Mission: Impossible film, as he says the stunt saw him 'pass out multiple times'

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.

Directed by Christopher McQuarrie, the eighth instalment in the spy thriller franchise is set to hit theatres on May 23

Tom Cruise, famously known for doing his own stunts, said he passed out while hanging onto a plane in 'Mission: Impossible — The Final Reckoning.'