Ride This TrainAmazon. com This concept album ranks with the most thematically ambitious of Johnny Cash's career, though the title's a little misleading. Instead of a collection of train songs (the sort featured in the Cash catalogue from "Hey Porter" to "Orange Blossom Special"), he alternates the spoken word narrative of a rail trip that crosses the country (and cuts across centuries) with songs about the characters you might meet along the way. From a Kentucky