 As Korben and Leeloo approach an intersection in his cab the camera  whips forward to reveal to the audience that six police cars are  waiting for him ahead. In the far background, behind the police  cars, is a chase between a police car and a long black car complete  with muzzle flashes to represent gun fire between the two cars. Ever  an eye for detail, Luc Besson (qv) noticed the embellishment the  first time the visual effects shot was reviewed, thought that it was  funny and it remains in the final film.