Back to the Future Part III (1990) - 4 quotes
Directed by Robert Zemeckis, starring Christopher Lloyd, Elizabeth Shue, Lea Thompson, Mary Steenburgen, Michael J. Fox, Thomas F. Wilson
Jennifer: Excuse me, Doc Brown. I brought this message back from the future and, well, now it's erased.
Doc: Of course it's erased.
Jennifer: But what does that mean?
Doc: It means your futures haven't been written yet. No one's has. So make it a good one, the both of you.
Doc: This'll shoot the fleas off a dog's back at 500 yards, Tannen! And it's pointed straight at your head!
Marty: Clara Clayton was supposed to die in the ravine. All the teachers tell the kids a story about a schoolteacher named Clayton who died in the ravine, and all the kids in town remember it because they all have a teacher they'd like to fall in the ravine.
Doc: Marty, you're not thinking fourth-dimensionally!
Marty: Yeah, right, I have a real problem with that.