A bolt from the past

What should rockers do when the paunch starts to sag over the jeans and the gray hair starts to glint in the spotlights? Have some self-respect and stop shaking that wrinkled booty, says rock critic John Strasbaugh in his new book "Rock 'Til You Drop: The Decline from Rebellion to Nostalgia."

Rock dinosaurs will never listen, of course; there's too much gold in them thar stadium tours. Still, Strasbaugh, a middle-ager himself, has a point.

Film directors would seem to have it easier: They can play the enfant terrible long after the shag cut gives way to the comb-over. But though older filmmakers can keep shaking it on the screen, they can't keep faking it forever. Sooner or later, nostalgia takes over -- just ask Oliver Stone.