Every kid in school knows that story, 'cause we all have teachers we'd like to see fall into the ravine.
4 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 00:46:23.318 in the DVD version of the movie.
Quote context
[...]
- Come on, Doc. Did you see the way she was looking at you?
- She did have quite a scare, right?
- After all, Miss Clayton almost ended up at the bottom of Clayton Ravine.
- 100 years ago! That's this year!
- Then she was supposed to go over in that wagon.
- Now I may have seriously altered history.
- Look, Doc, what's the worst that can happen, huh?
- So they don't name the ravine after her.
[...]