In a rare instance of being less slow-witted than his bandmate, Nigel Tufnel (Christopher Guest) steps in to supply the missing adjective: "clever." Forty-one years later, the fictional hard-rock supergroup is back to toeing that line in Spinal Tap II, with Reiner once more at the helm and Harry Shearer joining McKean and Guest by returning as bassist Derek Smalls, the self-described "lukewarm water" between the sparring guitarists' "fire and ice."