SIR Michael Caine was so terrified by the late Heath Ledger'S chilling depiction of the JOKER in new Batman film THE DARK KNIGHT he forgot his lines. The 75-year-old actor plays a butler in the movie and he admits the star turned him into a wreck when the pair came face to face for a scene. He says, "You think Jack Nicholson in the role and you can't imagine anyone topping him. Heath's just as good in another direction. He's terrifying. "The first time I saw him, we were rehearsing. He comes up in the elevator to me in Batman's flat and raids the place. "And I hadn't seen him, I'd never met him and he comes out screaming and it's like 'wow'. I completely forgot my lines. Scary. It will frighten the life out of people."