Hollywood star Mel Gibson has ruled out making any more sequels to his most popular movies, insisting he's too old for the action roles. Both 1979's Mad Max and 1987's Lethal Weapon spawned successful follow-ups but Gibson fears both he and the franchises are too tired now to enjoy further screen time. He says of a fourth Mad Max, "I'm getting a little long in the tooth for that one," adding of cop drama Lethal Weapon, "Oh boy, was that done to death."