Potts, the engineer of the Chicago Express and the protagonist of “How Potts Saved the Night Express, is humble and always aware of his surroundings. The foils in the story help us notice his specific character traits. As an engineer it is important to be on constant lookout for other trains to ensure the safety of your own train. Potts experienced this the hard way. One night when chugging along out of Burlington he came across a tanker whose caboose became unattached and started speeding towards the rest of the train. This was bad for both Potts’s train and the tanker because the collision would cause an explosion that would hit the Chicago Express most likely killing and injuring many people. In a matter of seconds Potts blew his whistle