In Walters head he is a brave , confident man who would do anything and is not afraid to try new things. in his reality he is too afraid to stand up to his wife so he just lets her push him around.
In the story Walter Mitty can't a small people on do anything and was know now for being the best pilot. The story takes place in World War Two.
While waiting for his wife he stood against a brick wall and went back to the fire station in his imagination.then he stood up to his wife and told her what he was doing, but she still didn't believe him.