An overactive editor, who changes shots too frequently, is like a tour guide who can’t stop pointing things out: “And up there we have the Sistine Ceiling, and over here we have the Mona Lisa, and, by the way, look at these floor tiles . . .” If you are on a tour, you do want the guide to point things out for you, of course, but some of the time you just want to walk around and see what you see.
