Is Twenty Flight Rock the most important record in modern music? Well, it was because Paul McCartney knew how to play Twenty Flight Rock that John Lennon wanted him to join The Quarrymen. Just imagine if Paul had learned something else and John had picked another bass player? But hey, that's not all that is great about Twenty Flight Rock. It may not be known to the wider world as Somethin' Else, C'mon Everybody and Summer Time Blues, but it was Twenty Flight Rock that appeared in seismically influential The Girl Can't Help It.