Jake Gyllenhaal Briefly Hospitalized After Punching Mirror on Set

Jake Gyllenhaal was briefly hospitalized Wednesday morning, after punching a mirror on the Los Angeles set of his new movie, Nightcrawler.

According to PEOPLE magazine, a Nightcrawler source explained that Gyllenhaal freaked out while in character for the drama, for which he lost 20 pounds to play a crime scene reporter.

"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."

A source close to Gyllenhaal, 32, explained that his injury, which occurred during an intense scene after an 18-hour day, only required a few stiches from the Emergency Room.

Gyllenhaal returned to set later Wednesday afternoon.