One day an old woman wants to see her son in Paris. When she goes to the small station, she forgets the time the train is coming and leaving. She looks around and she sees a boy playing with a toy pistol(手枪) nearby. She comes up to him and asks for help. The boy doesn't say a word. He only points to her with his pistol, says"/ tu: tu: tu: tu: tu: tu: /", then he runs away quickly. The old woman is very angry. She doesn't know why the boy plays such a joke with(同某人开玩笑) her. The train comes. She gets on the train. When the train starts, she suddenly smiles: How clever the boy is! He tells her the time in that way!
—He _______.