First, you turn the time circuits on.
5 seconds sound clip from the Back to the Future movie soundboard.
You can hear this line at 00:24:37 in the Blu-ray version of the movie.
Quote context
[...]
- And he's completely unaware that anything happened.
- As far as he's concerned, the trip was instantaneous.
- That's why his watch is exactly one minute behind mine.
- He skipped over that minute to instantly arrive at this moment in time.
- Come here. I'll show you how it works. All right.
- First, you turn the time circuits on.
- You input your destination time on this keypad.
- Say you want to see the signing of the Declaration of Independence.
[...]