Marvin: C'mon man, let's do something that really cooks.
Marty: Something that really cooks.
Marty thinks - then comes up with the perfect piece!
Marty: (to dancers) All right, All right this is an oldie, but uh, it's an oldie where I come from. (to Starlighters) All right guys, it's a blues riff in B, watch me for the changes, and uh, try and keep up, OK?
Music: Johnny B Goode by Marty McFly with the Starlighters
Marty starts to play the famous intro from this song. The dancers and the band seem to like it, so Marty starts to sing.
Marty: (singing) We're down in Louisiana, down in New Orleans, Way back up in the woods among the evergreens There stood an old cabin made of earth and wood There lived a country boy name of Johnny B Goode. He never ever learned to read or write so well, He could play a guitar just like he's ringing' a bell. Go, go, go Johnny go, go; go Johnny go, go, go; go Johnny go, go; Go Johnny go, go, go; Johnny B Goode..
Cut to George and Lorraine dancing. A couple dance past them.
Boy Dancer: Hey George, heard you laid out Biff, nice going!
Girl Dancer: George, you ever think of running for class president?
Marvin heads to the edge of the stage, where there is a telephone. He dials a number.
Marvin: Chuck, Chuck, its' Marvin. Your cousin, Marvin Berry! You know that new sound you're looking for? Well, listen to this!
Marvin holds the phone to the music so Chuck can hear it (Note: this is a little joke - Chuck Berry originally composed the song.). Marty then plays a solo. He goes a bit overboard, and by the time he's finished playing some rock music, the dance is silent, looking at him. Strickland is covering his ears.
Marty: I guess you guys aren't ready for that yet. But your kids are gonna love it.
Marty exits, but sees Lorraine before he gets to the door.
Marty: Lorraine!
Lorraine: Marty, that was very interesting music.
Marty: Uh, yeah.
Lorraine: I hope you don't mind but George asked if he could take me home.
In the background is George. He comes up to them.
Marty: Great! Good, good, Lorraine. I had a feeling about you two.
Lorraine: I have a feeling too.
Marty: Listen, I gotta go but I wanted to tell you that it's been...educational.
Lorraine: Marty, will we ever see you again?
Marty: I guarantee it.
George: Well, Marty, I want to thank you for all your good advise, I'll never forget it.
Marty: Right, George. Well, good luck you guys.
Marty heads for the door, and then turns back to the couple.
Marty: Oh, one other thing, if you guys ever have kids and one of them when he's eight years old, accidentally sets fire to the living room rug, go easy on him.
George: (a bit uncertain - what an odd thing to say!) OK.
Marty leaves. Lorraine turns to George.
Lorraine: Marty, such a nice name.
At the clocktower, Doc checks his watches (He's wearing 2 for some reason).
Doc: Damn, where is that kid? Damn. Damn, damn.
Marty pulls up, in his 1985 clothes.
Doc: You're late, do you have no concept of time?
Marty: Hey c'mon, I had to change, you think I'm going back in that, that zoot suit? The old man really came through, it worked!
Doc: What?
Marty: He laid out Biff in one punch! I never knew he had it in him! He never stood up to Biff in his life!
Doc looks at the photograph. Marty, Linda and Dave are all restored.
Doc: Never?
Marty: No, why, what's the matter?
Doc slips the photo back in Marty's pocket, shaking his head.
Doc: All right, let's set your destination time. This is the exact time you left. I'm gonna send you back at exactly the same time. It'll be like you never left. Now, I painted a white line on the street way over there, that's where you start from. I've calculated the distance and wind resistance retroactive from the moment the lightning strikes, at exactly (checks watch) 7 minutes and 22 seconds. When this alarm goes off you hit the gas.
Marty: Right.
Doc: Well, I guess that's everything.
Marty: Thanks.
Doc: Thank you.
Marty hugs Doc.