I’m breathing in my own carbon dioxide. It builds up in the body and affects the muscles... You have to overcome all of that while you’re doing it, and be present.

"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.

Try a single issue or save on a subscription Issues delivered straight to your door or device Tom Cruise is no stranger to difficult stunts, as he's proven time and again in the Mission: Impossible franchise,