V #5674. The producers contacted St. Louis Car Co.  for original blueprints of the car and painstakingly reproduced it.  Lights were mounted along the car exterior and illuminated  sequentially to simulate a speed of 30 mph. The NYC Transit  Authority refused to grant permission for filming on its property.  Subway footage was filmed by concealing the cameras inside bags.  Police became suspicious when they heard whirring sounds inside the  bags.