Jared Leto, frontman of 30 Seconds to Mars and actor, lost his cool at Sundance Film Festival this week where he was promoting his new movie 'Chapter 27.' Sources from the New York Post stated that while a photographer was taking snap shots, Leto started screaming "No! No more, bro!" Soon after, a a large unknown man yanked on Leto's hair and the two were quickly shouting in each others faces. Fortunately no one was hurt, but Leto came back a few hours later looking to settle the score.

[Via New York Post]