Jennifer: Marty, one rejection isn't the end of the world.
Jennifer sure knows her man. And let's be honest—we've all been there. We suffer one minor setback, and suddenly the sky is falling. But that's how it can feel sometimes. At least Marty's girlfriend knows she can take his mind off it by sucking a little face.
Marty: Alright, okay Jennifer. What if I send in the tape and they don't like it? I mean, what if they say I'm no good? What if they say, "Get out of here, kid, you got no future." I mean, I just don't think I can take that kind of rejection. Jesus, I'm beginning to sound like my old man.
Ahhh. Now we can see where Marty's defeatist attitude comes from. He's watched his "old man" give in and give up for years. It's all he knows. So when the going gets tough, he knows that the tough… pack it in.
Strickland: Shape up, man. You're a slacker. You wanna be a slacker for the rest of your life?
Marty acts like the words don't hurt him, but based on everything else we know about him, we have a hard time believing they don't affect him on some level. He wants to be smart, and popular and recognized for his talent…he sometimes just doesn't want to work for all of it. Because…working is hard. Ain't nobody got time for that.
George: Oh, no no no, I never uh, I never let anybody read my stories. What if they didn't like them, what if they told me I was no good? I guess that would be pretty hard for somebody to understand.
Like father, like son. Eerily like son, in fact. George practically reads back to his future son an earlier part of the script. Marty ends up doing plenty to help George, but this is where George helps to open Marty's eyes.