Jake Gyllenhaal was rushed to the emergency room on Wednesday upon slicing his hand as he punched a mirror on the set of his new movie Nightcrawler.

Gyllenhaal, who plays a freelance reporter covering the underground crime world of Los Angeles in Nightcrawler, was reportedly in character as Lou when the accident happen. In a scene he was filming towards the end of an 18-hour day, his character was in a rage while staring at his reflection.

Jake Gyllenhaal Hospitalized

"Jake flipped out," a source on set told People. "His character was looking into a mirror during the scene and punched the mirror in anger and broke it, cutting himself so bad he had to be taken to a hospital."

"The scene was emotionally charged and his character was talking into a mirror and he got so into it, he banged his hands against the mirror and it broke and cut him," another source added. "It was all the scene and not because he was mad about anything else."

After receiving stiches in the emergency room, Gyllenhaal was reportedly ready to go and returned to set.

Jake Gyllenhaal Lost 20 Pounds

For the part of Lou, Gyllenhaal has dropped about 20 pounds, giving the typically buff actor an entirely different look. "I knew that [Lou] was literally and figuratively hungry," Gyllenhaal told Us Weekly, adding that he wanted to get into a "mode where I was always a bit hungry." How did he shed the weight? "I just love this movie," he said. "That’s how I did it. There really was no technique."

Nightcrawler, which is slated for a 2014 release, also stars Rene Russo, Bill Paxton and Riz Ahmed.

– Chelsea Regan

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