Marty: Wait, you don't understand. You gotta play. If there's no music they can't dance. If they can't dance they can't kiss, if they can't kiss, they can't fall in love and I'm history!
Marvin Berry: Look kid, the dance is over, unless you know somebody that can play the guitar.
Marvin Berry: Look kid, the dance is over, unless you know somebody that can play the guitar.
Marty : Wait, you don't understand. You gotta play. If there's no music they can't dance. If they can't dance they can't kiss, if they can't kiss, they can't fall in love and I'm history!
Marvin Berry : Look kid, the dance is over, unless you know somebody that can play the guitar.
http://www.moviequotedb.com/movies/back-to-the-future/quote_2693.html