It's considered impolite to talk during a movie.
Jeff is watching a movie with his friend Dan when he suddenly thinks of an interesting discussion topic about some part of the film.
Jeff wants to discuss the topic with Dan.
Jeff makes a mental note of the topic so that he can bring it up after the film is over.
Jeff starts talking to Dan about the topic in the middle of the movie.
Dan enjoys discussing the topic with Jeff on their ride home after the film.
Dan is embarrassed when other people in the theater turn and tell them both to be quiet.