Ken Kesey’s usage of laughter in the novel One Flew Over the Cuckoo’s Nest is that it is a powerful factor when it comes to a human’s sanity and liveliness. The first entrance of McMurphy in the novel is an enormous surprise to the patients in the mental institution. Besides occasional chuckles here and there from the patients, they had never encountered full on laughter in their time inside of the institution. They had never seen as much life inside the walls of the ward until the arrival of McMurphy. He is unaffected by his new and drab surroundings. McMurphy’s laughter begins to bring back light and humanity into the dark ward, causing the patients to laugh and return to the reality mindset, especially during the most intense times of trouble. He is able to achieve laughter from all of the patients on the fishing trip. Despite the Big Nurse’s idea that laughter is what makes one insane, McMurphy is able to bring sanity back into the patients through the power of