“Peter Pan & Wendy” — so the child actors on set remained genuinely afraid of him when he played Captain Hook.“[Director] David Lowery had the idea of really trying to encourage them not to see me when I wasn’t Hook,” Law, 50, said Tuesday on “The Tonight Show Starring Jimmy Fallon.”“So I just stayed as Hook the whole time, which was an opportunity just to be really scary and mean. Sounds kind of awful,” “The Holiday” actor admitted.