Dear Wendy (2004)
Huey's gun is called Lyndon. It's exactly the kind of ancient weapon used in the older film.
Especially the ending is pretty obviously a reference to the ending of Full Metal Jacket.
The shot of the map of the town square and the surrounding houses is a direct reference to the chalk lines used as walls and houses by screenwriter Von Trier in Dogville
Features a long-nosed revolver that can be geometrically used to ricochet bullets off the walls.
Documentary is based on the movie
footage used in documentary