 An innovative musical performed on a real railroad track with the audience one side of the tracks and the musicians on the station side. Also performing are Sonny Terry and Brownie McGee : Rocking and a whooping  Talking harmonica blues  I m a roaming rambler .. Cousin Joe sings  Hot dog  and  I m a railroad porter .. Muddy Waters performs  Blow wind blow  and  You can t lose what you never had .. Sister Rosetta Tharpe performs  Didn t it rain children ,  Trouble in mind  and  Whole world in his hands .