you need to watch this if you're a Jack Nicholson fan at uh ready for some wild film trivia all right let's dive in fact number one did you know that Jack Nicholson improvised the iconic here's Johnny line in yep totally Off Script director Stanley kubri loved it so much he kept it in fact number two in 1989 Jack Nicholson negotiated an unheard of deal he took a lower salary in exchange for a cut of the film's profits and merchandise sales result he made around 90 million talk about a smart move and lastly in Nicholson's commitment to his role was so intense that he actually stayed in a mental institution he wanted to fully understand the experience as a method acting at its finest folks so there you have it three strange but true facts about Jack Nicholson's Unforgettable films if you enjoyed this hit that like button and subscribe for more mind-blowing movie trivia see you next time