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In the story "The Secret Life of Walter Mitty," Walter Mitty's daydreams are triggered by mundane or stressful situations in his real life. These triggers often involve feelings of inadequacy or a desire to escape from the demands of his everyday routine.
The first daydream Mitty has is caused by him driving "too fast" with his wife. He dreams he's flying a hydroplane, and he comes back to reality when his wife yells at him. The second dream is caused by him putting on his gloves. He dreams he's an amazing doctor, and comes back when a parking attendant yells at him. In the third dream, he's in court on the way to jail, and he's brought back when he remembers he needs dog biscuits. It's caused when he hears a boy talking about the Waterbury trials.
In "The Secret Life of Walter Mitty," Walter Mitty's real life is characterized by a mundane routine and a lack of excitement. He is often overshadowed by his dominating wife, feels unfulfilled in his work, and escapes into elaborate daydreams to cope with his dissatisfaction.
"Angel Pavement" opens with the introduction of Mr. Golspie, who starts a new job at the drapery firm Twigg & Dersingham. The prologue sets the scene for the novel's exploration of the lives and interactions of the employees at the company against the backdrop of London's bustling Angel Pavement.