Rob Reiner's cult satire about a fictional heavy metal group named Spinal Tap spoofs nearly every facet of rock 'n' roll -- from vacuous modern songwriting and half-baked album promos to pyrotechnic concerts. Michael McKean, Christopher Guest and Harry Shearer portray the washed-up, aging British rockers whose tresses and egos outstrip their talent, with Reiner appearing as the filmmaker who's chronicling the band's calamitous comeback tour.