Best In Show will nip at the funny bone of all of us who get pumped by Christopher Guest in his mockumentary mode. You know who you are. You can still quote lines from Guest's 1997 gem, Waiting for Guffman, in which he played Corky St. Clair, the closeted amateur director from Missouri, who dreams of Broadway and sells Remains of the Day lunchboxes. You bought the new DVD, with extras, of Rob Reiner's
This Is Spinal Tap to watch Guest as lead guitarist Nigel Tufnel. But the real Guest fix comes