Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[EX Q]: Why are movie closing credits usually animated by scrolling them from the bottom to the top of the screen? Is this because in old times there was no computer animation and the credits text template was scrolled-up mechanically by a man/device? Nowadays there must be thousands of possible ways for credit frame transitions, but still the old one is preferred.
[EX A]: Why do movie credits scroll from the bottom to the top of the screen?

[EX Q]: In the movie Trainspotting when Mark "Rent Boy" Renton reads Diane's letter and Begbie arrives at his room, how did Begbie come to know where Rent was living?
[EX A]: How did Begbie track Rents?

[EX Q]: In The Piano (1993), Ada and Baine have a conversation like this:    Baine: How many would that be?    Baine: Yes. Ten keys.   And then both make love with each other.  What is the meaning of this conversation before making love?
[EX A]:
What is the meaning of this conversation before making love?

