Los Angeles: Jake Gyllenhaal drove himself 'insane with hunger' while filming for 'Nightcrawler'.


Jake Gyllenhaal. Pic/Santa Banta 

The actor's co-star Riz Ahmed, who plays Gyllenhaal's sidekick Rick Carey in the film thought he was going to be eaten alive during the movie, because Gyllenhaal was so hungry and living off a diet of chewing gum to lose 30 pounds for the role, reports femalefirst.co.uk.