 The nighttime crowd scenes outside the skyscraper were filmed on two  consecutive nights in September 1997, from about 5 p.m. to 7 a.m.  Due to cold rain and winds, many extras defected during the night or  developed antagonistic relationships with production assistants.  When the filming finished for the night, the small percentage of  extras remaining actually ran back to the holding area in the food  court of a nearby mall to turn in their vouchers and go home as soon  as possible.