Amy Farrah Fowler: It is the emergency pep talk you made when you were a kid.

Sheldon Cooper: Oh, that. I was saving it for the day they stop making Star Wars movies. I don't think that's ever gonna happen.

Amy Farrah Fowler: How long has it been since you've seen it?

Sheldon Cooper: Not since the day I recorded it. No, I had just watched Back to the Future II, where Marty McFly gets a glimpse of his future self and that got me thinking, the day may come where I needed my help, like they did with that movie. That was not great.