sentences:  Dave sings the second verse, with Sam joining in the chorus.Sam sings the third verse, with Dave joining in the chorus, followed by a brief bridge section by Dave and then a coda, in which both Sam and Dave repeat the title phrase a half-step up, before the song's fade.The exclamation "Play it, Steve" heard in the song refers to guitarist Steve Cropper of Booker T. & the M.G.