I bumped into R, a former graduate student and good FB friend at Hastings, and he was out to rent a movie, and then show a few scenes from the movie, as a way to teach dialogue to his creative writing students. That seemed a cool idea, and I immediately thought of my favorite movie that no one has ever seen, OFF THE MAP. I suspect one reason the dialogue is so good in the movie is that it was originally a play. My prejudice for the word over the image (in film) is showing here, but I must praise the film also for the way each frame is used, and how multiple actions can go on in a frame during the film that do not confuse.
I send my students out into the world to listen in and record dialogue, and then ask them to explain why the dialogue they recorded would not make good dialogue in a story, although it may give them some insights into language and some ideas for a story or a character.
Any thoughts, you writers, if you're out there?