Jack stared impatiently at the red traffic light and waited. He was anxious to get back to school after lunch. The light changed to green but as the boy stepped into the street, the sound of an approaching siren told him that the light must be ignored and he re turned to the curb. The emergency car passed, the traffic light cycled green again and Jack made his way safely across the street where he was suddenly confronted by a very large dog. The boy\u27s initial reaction of fright was instantly dispelled when he recognized the dog\u27s friendly intentions by its wagging tail and playful manner
