6. Jack Nicholson as Jack Torrance in THE SHINING
Never one to be dull, Nicholson has also played all manner of nut jobs. But nothing in his spikes the psycho-meter like ax-wielding Jack Torrance. Sure, blame it on the hotel, blame it on those creepy little ghost girls, blame it on writer's block or the ocean of blood streaming out the elevator, but when Jack chases Shelley Duval through the ice maze, it's like he's chasing us, and we don't understand, so we're crying, and it's very, very cold.