Now I wish I'd paid him off.

2 seconds sound clip from the Back to the Future Part III movie soundboard.

You can hear this line at 00:35:49.948 in the DVD version of the movie.

Quote context

[...]

- I know, Doc, but I had to come.

- But it's good to see you, Marty.

- You're gonna have to do something about those clothes. You walk around town dressed like that, you're liable to get shot.

- Or hanged.

- What idiot dressed you in that outfit?

- You did.

- Shot in the back by Buford Tannen over a matter of $80, September 7? That's this Monday!

- Now I wish I'd paid him off.

- And who's this beloved Clara? I don't know anyone named Clara.

- I don't know, Doc. I thought maybe she was a girlfriend of yours.

- Marty, my involvement in such a social relationship here in 1885 could result in a disruption of the space-time continuum.

- As a scientist, I can never take that risk. Certainly not after what we've already been through.

[...]