Relying on a low budget of $50K, the movie was shot over five nights in a single location with dialogue that was largely improvised.
The actor who plays Amir, Alex Manugian, is also the co-writer. He was essentially "the mole" who helped guide scenes if the actors went astray.
Instead of scripts, the actors would each receive only a small paragraph (that only they would see) as their 'goals' for the day. This allowed for the story to unfold naturally and create genuine reactions in the other actors.
The director, James Ward Byrkit, wanted to use his own house as the setting of the movie. Since his wife was 8-and-a-half months pregnant and wanted a homebirth, she agreed to let him so long as he could do it in 5 days.
The neighborhood was supposed to look completely dark when the first group visits the other house. It was the same night a Snickers commercial was being filmed in the neighborhood which used huge lights and hundreds of people.