When someone is passionately trying to describe a movie and asks me if I've seen it I lie and say I have regardless if I have or haven't.
Why would you do that when someone is telling you about a movie.
I just want to kill the conversation because I don't know anything about the movie and don't care, but he thinks I'm interested.
Even if you don't want to hear about the movie you shouldn't lie and say that you've already seen it. They may ask you about details in the movie and find out that you lied, which would be embarrassing. You have to just tell people that you're not interested in talking about movies.
Alright, I'll try not to lie anymore.
That's good. You will be saving yourself a lot of frustration.