Why did cool hand luke behead parking meters?

In the film "Cool Hand Luke," the protagonist Luke Jackson, portrayed by Paul Newman, beheads parking meters as an act of rebellion against the oppressive atmosphere of the prison system. This act symbolizes his defiance and desire for freedom, showcasing his individuality and resistance to authority. It also serves as a moment of comic relief, highlighting Luke's irreverent nature and his struggle against the constraints imposed on him. Ultimately, it reflects the broader themes of rebellion and the quest for identity in a conformist society.