I think Jack Nicholson is at his best when he plays people who are caught up in extraordinary situations or circumstances ; two of his best I still think are : The Joker in the first Batman movie with Micheal Keaton , where he is played the homicidal manic and arch foe of the Batman and Jack Torrance in the Shining , he excels as an actor when he portraying crazy people or slightly not so normal people and he was perfect in The 3 Witches of Eastwick , as many have said , Jack is King . I believe Jack Nicholson is one of the greatest top five actors of our time , next To Marlon Brando , Robert Duvall , Al Pacino and the queen herself Audrey Hepburn . Thankyou Jack Nicholson for one of the greatest horror movies of our time ; next to Jaws , the original Halloween movie and the first Saw movie . And my personal favorite , the original , The Fly with Vincent Price , I'll never forget the image of the half human ,half fly stuck in the spider's web screaming , '' Help Me , somebody Help Me . Who could ? :)