The incident the film is based on happened in a 2 story house in South Austin, and it was filmed in Heather Ross' single story home in Cedar Park.
In the film, Nicole, Heather's sister, is alone in the living room. In real life, she had a slumber party in the upstairs game room where Heather had to crawl past stairs to get help. She also only crawled on carpet in real life.
The film was shot in one day, under time, and the final scene was shot repeatedly as the final camera battery died.
Another version of this film was filmed a few years ago, but was never completed. It was adapted to have Heather having a seizure in bed as an adult, her real life Mom was in it, and her boyfriend at the time filmed it. It died before it got to the editing room.