As the night wore on, Rohan became more and more engrossed in the film. He watched as Jack Torrance, played by Jack Nicholson, descended into madness, and the hotel seemed to exert some kind of supernatural influence over him.
Further reading (suggested)
Jack Nicholson’s unhinged portrayal of Jack Torrance and Shelley Duvall’s raw, terror-stricken performance as Wendy. The Shining Filmyzilla