At no point should we be able to pause a movie and be unable to answer three questions…. What does the hero want? Who/what is opposing the hero getting what the hero wants? What will the hero’s life look like if he does/does not get what he wants? If you find yourself daydreaming in a movie, then it’s probably not answering one of these questions and descending into noise. Anything that doesn’t serve the plot, has to go. We are either making music or making noise.