Actor Samuel L. Jackson revealed a trade secret from Bruce Willis that the actor says kept him sane during his five-decade career in Hollywood. Speaking to Vanity Fair earlier this week, Jackson said his “Die Hard With a Vengeance” co-star had a surprising reason for returning to the role of John McClane throughout his career.

Samuel L. Jackson has revealed the insightful career advice that Bruce Willis gave him on the set of "Die Hard with a Vengeance."