Blake stopped the bus and called the police; And Many a fire was set that night, And Many a head turned ghostly white Because she dared disturb the peace.
Explanation:
Back in the days of segregation blacks were to sit in the back of the bus and whites to the front, so given that Rosa Parks refused to give up her front seat to a white man she disturbed the peace of the norms of those days. In other words she broke a rule.
