No, sir! I'm gonna make something of myself. I'm going to night school, and one day, I'm going to be somebody.
8 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:40:26 in the Blu-ray version of the movie.
Quote context
[...]
- Say! Why do you let those boys push you around like that for?
- Well, they're bigger than me.
- Stand tall, boy. Have some respect for yourself.
- Look at me. You think I'm gonna spend the rest of my life in this slop house?
- That's right. He's going to be mayor.
- Now that's a good idea! I could run for mayor.
- A colored mayor. That'll be the day.
- You wait and see, Mr. Caruthers. I will be mayor.
[...]