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.

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

"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.