Why do you think the Chief experience a return of thefog"at the end of this section?

Chapter please?

part one

In Chapter One, Ratched orders the black boys to shave Chief Bromden, who quickly hides in terror. While hiding, he thinks about his father and growing up on the banks of the Columbia River. Soon, one of the boys finds him, and they start to shave him. Terrified, the Chief hallucinates that an Air Raid has begun in the ward and that a thick fog begins to overwhelm him.