Mrs. Green, an eighty-year-old woman, drove her small car to the shops every Saturday to buy groceries. She drove carefully and never had an accident, despite her grandchildren's offers to drive her instead. She cherished her independence and fifty years of driving experience.
One Saturday, her car stalled at a red light and refused to start again, even as the traffic lights cycled through green, yellow, and red. As she wondered what to do, a policeman approached and asked kindly, "Good morning. Don't you like any of our colours today?"