Emily Blunt is revealing how she was “terrified” to use AI in her upcoming film Disclosure Day, directed by Steven Spielberg, so she decided to find another way to pull off one of her character’s most unusual scenes.

On a recent episode of Hot Ones, Blunt appeared to promote Disclosure Day, which hits theaters June 12. In the film, she plays Margaret Fairchild, a TV meteorologist and former journalist who suddenly gains abilities after an encounter with non-human life. In one scene, Margaret has a major vocal change and begins speaking a non-human language during a live weather segment.

“It’s a four-minute oner that we shot that leads up to that moment where she’s gradually sort of disintegrating,” the Devil Wears Prada 2 actress said. “There’s various ways you could do it. You could go the AI route, which I’m a bit terrified of.”

So Blunt found another way to create the sounds her character required without relying on AI.

“I thought I could make some really strange sounds,” she continued. “I said maybe I could come in and we’ll just do a range of weird sounds. And it’s what we did. I did sort of the clicking sounds, I did sort of humming sounds, consonant sounds, breathing, strange sounds.”