The Dragon
Ray Bradbury
 The story concerns two men, a moor, and a full blown dragon. The story begins with two knights, who, we are told, have a mission to go and slay a dragon. The dragon as they described, is huge, fire-breathing, horrific, and only has one eye. They charge at the dragon, and they fail. Presumably they died from the attempt. Readers find out that the 'dragon' is actually a train, a modern-age steam train. And the dragon's single eye is, in fact, the train's head light.