What does the main character dream about after falling asleep in the movie theatre in the story, King of the Bingo Game?

The man falls asleep and dreams of his boyhood in the South. In his dream, he is walking along a railroad trestle when he sees a train approaching. He runs off the trestle as quickly as he can possibly go, only to find the train has left the track and is following him down the street. Adding to his horror is the fact that white people are lining the street, laughing at him while he runs from the train.