The clip Following Biff Part 2 from Back to the Future Part II (1989) with Christopher Lloyd, Michael J. Fox
Other self? Yes. There are now two of me here
and there are two of you here.
The other me is the Dr. Emmett Brown from 1955.
The other me that helps the other you get back to 1985.
Remember the lightning bolt at the clock tower? That doesn't happen until tonight.
Be careful not to run into your other self. Let me give you some money.
Have to be prepared for all monetary possibilities.
Get yourself some '50s clothes. Check, Doc.
Doc. Come in. This is Marty. Over.
Roger, this is Doc. Are you there? Yeah, Doc. I'm at the address.
It's the only Tannen in the book, but I don't think this is Biff's house.
It looks like an old lady lives here.
Where are you going, Biff? I'm going to get my car, Grandma.
When are you coming back? I want you to rub my toes.
Shut up, you old bag.
Give us our ball back.
What ball? That ball!
What are you talking about?
Give us our ball!
Is this your ball? Yeah!
You want it back? Yeah.
Go get it.
Doc, it is Biff's house. I'm on him. Over.