Omen III: The Final Conflict (1981)

Director: Graham Baker

Starring: Sam Neill, Rossano Brazzi, Don Gordon, Lisa Harrow, Barnaby Holm, Mason Adams, Robert Arden, Leueen Willoughby

Locations

Kilnsey Quarry, Yorkshire
The scene where Damien lands by helicopter to address his followers. About 500 extras were strategically placed on the sides of the quarry to look like several thousand. Filming took all night with half a dozen takes or so chanting 'we hear and obey', all for a few minutes on screen. At one point the director gave the extras a lecture for not taking it seriously.