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Shooting “Everest” had many scary moments.

“It was such an epic adventure, filming it,” says Naoko Mori of her new film, the climbing-disaster true story “Everest.” The film was shot on actual mountains, including climbing as high in the actual Mount Everest trek as the Tengboche Monastery (12,687 feet high) and shooting in the Alps. Sounds fun, right? “That very scary suspension bridge in the movie? That’s a real bridge we had to cross,” she says. “I thought I was totally fine with heights until I went to cross that bridge and my knees buckled. My hero, Josh Brolin, came straight over, took my hand, and we crossed that bridge. He was talking to me. It turned out he was quite scared of heights as well, so we were kind of helping each other.

“One take, we were in the middle of the bridge and it was a helicopter shot — the helicopter got the bridge swaying so much, it scared the yaks behind us. It’s literally like 3 feet wide. I get head-butted, Jason (Clarke) gets pushed around. That was terrifying.”

Mori says in the Alps, they shot in “this really dangerous, avalanche-prone area … there were a couple of times we lost the whole set because of avalanches.”

And as to the glamour of acting: While shooting in 20-below-zero temperatures, “Makeup would say, ‘We don’t need to do anything. Your eyelashes are actually frozen.’ ”