What does nurse ratched do to try and intimidate mcmurphy?

Ratched knows McMurphy isn't crazy and McMurphy knows that he wants to challenge Ratched's iron clad authority. Ratched intimidates McMurphy, for example, by changing the rules on him simply because she has the power to do so. She stops the voting before all the guys vote to change the schedule in order to watch the world series. Harding relates the tools that Ratched uses to gain submission from the patients, including domination and even electroshock therapy (EST). McMurphy bets the patients that he can get Nurse Ratched to “crack” or show some vulnerability within a week.