It's one of cinema's greatest ironies that editing can make or break a film, but few moviegoers understand what an editor actually does. Editing involves taking shots and assembling them in the right order, yes, but what makes an order — all the transitions from moment to moment and scene to scene — "right"? Even if we can't explain good editing, we know bad editing when we see it, and even more so when when we feel it. The hard-to-pin-down sensation of a movie being "off" or "wrong" often comes out of incompetent editing, and by breaking down the bad editing in a variety of recent pictures, these three videos throw into contrast what it takes for editing to be good.