All you have to do is drive the time vehicle directly toward that screen, accelerating to 88 miles an hour.

Dr. Emmett Brown (Christopher Lloyd)

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

You can hear this line at 00:17:34.521 in the DVD version of the movie.

Quote context

[...]

- Time circuits on.

- I wrote the letter on September 1st, so we'll send you back the very next day, September 2nd. That's a Wednesday.

- September 2nd, 1885, 8:00 a.m.

- I get shot on Monday the 7th, so you have five days to locate me.

- According to my letter, I'm a blacksmith, so I probably have a shop somewhere.

- All you have to do is drive the time vehicle directly toward that screen, accelerating to 88 miles an hour.

- Wait a minute. Doc, if I drive straight towards the screen, I'm gonna crash into those Indians.

- Marty, you're not thinking fourth-dimensionally.

- You'll instantly be transported to 1885, and those Indians won't even be there.

- Right.

- Well. Good luck for both of our sakes.

[...]