When McMurphy puts his fist through the glass, is his actions premeditated or impulsive?

At this point in the novel, McMurphy is definitely thinking about what he wants to do. His putting his fist through the glass and having a "rational" explanation (he didn't see it because it was so clean) shows that he is thinking about his every action and fighting against the discrimination so obvious that is taking place when Nurse Ratched has her way.