The clip Taking the wrong book Part 2 from Back to the Future Part II (1989) with Christopher Lloyd, Michael J. Fox
Yes, you with the hat.
Who, me? Yes.
Be a pal and hand me a five-eighths inch wrench from the toolbox.
Don't you mean three-quarters?
Why, you're right.
I presume you're conducting some sort of weather experiment.
That's right. How did you know that?
I happen to have had a little experience in this area.
I'm hoping to see some lightning tonight
although the weatherman says there's no chance of rain.
There's going to be plenty of rain. Wind, thunder, lightning.
It's going to be one hell of a storm. Thanks. Nice talking to you.
Maybe we'll bump into each other again in the future.
Or in the past.
Doc, Doc! Come in!