Aaron Schimberg’s “A Different Man” follows a struggling actor named Edward, who, after undergoing an experimental facial reconstruction surgery, becomes fixated on an actor in a stage production of his former life. Schimberg’s screenplay touches on a lot of different themes, but the exploration of insecurity is the beating heart of the movie. His approach shows how insecurity can hold us back from achieving greatness while simultaneously depicting how it can transform someone into the worst version of themselves. The screenplay is masterful. Watching Edward slowly begin to drown in his insecurities is just horrifying as it is weirdly entertaining.