there was a little boy named Benny. He was a very shy boy. One day, while he was sitting on the fence by the railway, he witnessed an accident. The train that was passing by left three carriages behind! this was bad because the next train would crash into it. Benny immediately ran towards the signal-man in the signal-box to turn the green light to red. The other train immediately stop the train when he saw the red light. Who knew that such a shy boy could save lives?