Take away the exploding drummers and foil-wrapped cucumbers, and This Is Spinal Tap is a movie about people who take themselves seriously. Which is why it's a comedy classic. Christopher Guest used that same seriousness in three more improvised comedies: Waiting for Guffman, Best in Show and a new folk-music film, A Mighty Wind. Guest, who writes his movies with Eugene Levy, reunited with Tap alumni Harry Shearer and Michael McKean as the Folksmen in this film. All four sat with TIME's Richard Corliss and Josh Tyrangiel for a folksy conversation.
AFTER SPINAL TAP, WHICH WAS DIRECTED BY ROB REINER,...