This clip is a portion of the feature-length documentary of David Hoffman , recorded in 1973 at the prison outside New York City ,  a great performance by Mr BBking , performing the song " How Blue can you get a blues song first recorded by Johnny Moore's Three Blazers in 1949. It is a slow twelve-bar blues that jazz critic Leonard Feather and his wife, Jane Feather, are credited with writing. The song has been recorded by several blues and other artists. In 1964, it was a hit for B.B. King and became a staple of his live shows , especialy this one , so do you like this song ? and how blue can you get ?