Steven Spielberg’s “Raiders of the Lost Ark” plays like an anthology of the best parts from all the Saturday matinee serials ever made. It takes place in Africa, Nepal, Egypt, at sea and in a secret submarine base. It contains trucks, bulldozers, tanks, motorcycles, ships, subs, Pan Am Clippers, and a Nazi flying wing. It has snakes, spiders, booby traps and explosives. The hero is trapped in a snake pit, and the heroine finds herself assaulted by mummies. The weapons range from revolvers and machineguns to machetes and whips. And there is the supernatural, too, as the Ark of the Covenant triggers an eerie heavenly fire that bolts through the bodies of the Nazis.