Barnes' scene was rewritten after being influenced by night people encountered while shooting two other scenes.
A man held the cast and crew at gun point at 3am in front of his house, enraged at being awoken, and ordered everyone to disperse. The scene was crucial and had not finished being shot, so the cast and crew returned three weeks later and completed it by communicating soundlessly. The man never knew.
Almost every scene in the movie actually occurred in real life.
The man Barnes asks Nathan about is actually the main character of an earlier movie of the director's.
The movie was shot for less than US$500.