On Wednesday, Jake Gyllenhaal was sent to a Los Angeles emergency room after punching a mirror and severely cutting his hand. Don't worry, Gyllenhaal wasn't worked up in some sort of violent spree or drug-induced rage that provoked the incident. It was just Gyllenhaal being an awesome actor.
According to a source, Gyllenhaal was on the set of his new movieNightcrawler when the incident occurred. "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 actor needed stitches but apparently is doing fine, even returning to the set the next day.