- And this stays here. I didn't invent the time machine to win at gambling. I invented a time machine to travel through time!
- I know. I know. I know, Doc.

9 seconds sound clip from the Back to the Future Part II movie soundboard.

You can hear this line at 00:26:35.412 in the Blu-ray version of the movie.

Quote context

[...]

- The encounter could create a time paradox, the results of which could cause a chain reaction that would unravel the very fabric of the space-time continuum, and destroy the entire universe!

- Granted, that's a worst-case scenario.

- The destruction might, in fact, be very localized, limited to merely our own galaxy.

- Well, that's a relief.

- Let's go. I sure hope we find Jennifer before she finds herself.

- The skyway's jammed. It's gonna take us forever to get there.

- And this stays here. I didn't invent the time machine to win at gambling. I invented a time machine to travel through time!

- I know. I know. I know, Doc.

- So, Doc Brown invented a time machine.

(Flying police car landing)

- Hilldale. Nothing but a breeding ground for tranks, lobos and zipheads.

- Yeah, they ought to tear this whole place down.

- Welcome home, Jennifer.

[...]