Actors Who Fell Asleep On Set

Forget about crying on command—an actor's greatest challenge might just be staying awake while peacefully reclining in bed. It's a challenge that ultimately got the better of Treat Williams while filming the 1984 gangster epic Once Upon a Time in America, specifically during a sequence filmed after his character had been shot. "I'm lying in the bed, and we were talking, and then all of a sudden I feel somebody's arm on my shoulder," Williams told Entertainment Weekly. "I look up and it's Bob De Niro saying, 'Hey.' I go, 'Hey, what's up?' He goes, 'You wanna say your line? We rolled, and you were asleep. Wanna join us?'"