The Things They Do When They Make a Film -- The car films through the air with the greatest of ease. . .all in the cause of movie "stardom". The film was finished and "in the can" - all bar one vital scene. It didn't require any actors. Just one car for ducking purposes and a quantity of water in which to duck it. So yesterday, far from sunny Spain, where ***** of the film was made, the car was taken to a quarry at Beuront, Middlesex, with a convenient water-logged gravel pit. The quarry-owner d