Is Mitty's experience an isolated case in "The Secret Life of Walter Mitty"? Is his suicide an act of weakness?

Mitty's execution is only virtual! From the very start, Walter Mitty, the hen-pecked husband, is playing a mind game, taking on the identity of important or famous people. There is always an object (such as the glove for the surgeon) which triggers an association, bridging reality and fantasy. At the end while Mitty is waiting for his wife to come back from the store, it is the cigarette which inspires the scene: the war hero backed against a wall, ready to be shot and puffing on his last cigarette, but who does not need the blindfold to face death. Such ruthless courage is surely another quality Walter Mitty can only daydream about!