I had the honor to have lunch with John Hart once and we were talking about filming, well he was taking and I was listening, and he said that cutaways are extremely important in movie making. That's the reason for all the different camera angles in films. It's an art though to figure out how many and where. He was making a film once and there was a parrot off to the side and he kept panning to the parrot to break up the footage. I won't say what the film was but it was not your usual type.