Answer: Mrs. Mitty breaks into her husband's fantasy as he is imagining himself the commander of "a huge, hurtling eight-engined Navy hydroplane" fighting its way through a storm approaching hurricane velocity.
Explanation:
Not so fast! You’re driving too fast!” said Mrs. Mitty. “What are you driving so fast for?”
Very quickly James Thurber informs us that Mitty lives in a fantasy world at least partly to escape from his domineering wife who has the annoying habit of repeating everything she says.
