Saw A Mighty Wind tonight, Christopher Guest’s latest mockumentary (if you will) of folk music, and it was funny, but not funny enough. I almost feel sorry for Guest, who will have to labor in the immense shade of Spinal Tap for the rest of his life, and whose movies will never be possible to enjoy on their own terms because they will never stack up. All you need to know about A Mighty Wind is that its funniest moment involves Bob Balaban being slapped on the head: pure slapstick. At least Guest soldiers on; bully for him. Early success paralyzes some artists, like Ralph Ellison and Henry Roth, and no one ever quite lives it down. Stephen Vizinczey said once that failure is a kind of luck, as long as it doesn’t kill you.