He never ever learned to read or write so well, he could play the guitar just like he's ringing a bell.
7 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 01:27:43 in the Blu-ray version of the movie.
Quote context
[...]
- All right, guys, listen, this is a blues riff in B.
- Watch me for the changes, and try and keep up, okay?
- Way down in Louisiana Down in New Orleans, way back up in the woods among the evergreens.
- There stood a log cabin made of earth and wood where lived a country boy name of Johnny B. Goode.
- Go, go Go, Johnny, go, go. Go, Johnny, go, go, go. Go, Johnny, go, go.
- Hey, George, I heard you laid out Biff. Nice going.
- George, you ever think of running for class president?
- Chuck! Chuck, it's Marvin. Your cousin, Marvin Berry.
[...]