Most people would call it a crash; airlines and their cabin-staff talk of 'the unlikely event'. And indeed, for 20 years the aviation industry and its governing bodies have concentrated on preventing plane crashes altogether - with great success. The statistics show that you would probably crash only once in nearly 1,000 years of daily flights. But crashes still happen, and the chances of surviving them have not improved. The strength of modern jet bodies makes it possible to classify the majority of accidents as ' 'survivable'. Yet when survivors describe the plane's interior immediately after impact, they talk bitterly of collapsed seats and broken limbs, of blinding toxic fumes and burning upholstery, of coat racks blocking the emergency exits, of escape chutes that don't inflate. And all of this when speed of evacuation - officially 90 seconds - is vital to save lives. In short, the problems and dangers occur after the crash. Using unique film, Jack Pizzey examines the regulations