Sandra Bullock shot half of her scenes in 'Bird Box' blindfolded, kept running into the camera

In the new Netflix thriller Bird Box, Sandra Bullock and Trevante Rhodes play two of only a handful of people who survive an apocalyptic phenomenon that causes people to commit suicide at the sight of a mysterious presence. The survivors, then, wear blindfolds when venturing outside to avoid peering at the life-threatening supernatural force.

That meant a new type of acting for the co-stars.

“For half of the film we were blindfolded, and we asked for that to be so,” Bullock told Yahoo Entertainment at the film’s Los Angeles press day (watch above).

“They were navigating insane landscapes blindfolded,” remarked director Susanne Bier (Brothers, After the Wedding). “They were taught a little bit by someone who was like an expert on teaching blind people.”

Asked if they were ever afraid they were going to fall on their faces, Bullock shot back: “I did.”

Or at least she kept running into the Steadicam operator.

“For some reason he never ran into the camera like I did,” Bullock said as Rhodes laughed. “Why is that, we wonder? I don’t know. Maybe because I’m more committed. … I clipped the camera a couple times. It was no one’s fault but my own.”

“There was blood everywhere,” Rhodes responded.

“Only one time,” said Bullock. “We drew blood once.”

Bird Box premieres Friday.

Watch Bullock talk about her hopes for Ocean’s 9:

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