Cunningham later described the film shoot as being "guerrilla-style" with the crew spontaneously filming at locations and being forced to leave due to lack of permits; in retrospect, Lincoln said that "nobody knew what were doing." Much of the special effects in the film were achieved practically, some at Lincoln's suggestion: For example, the sequence in which Phyllis is disemboweled, Lincoln helped craft fake intestines with condoms filled with fake blood and sand. For the murder sequence of Sadie in the swimming pool, Rain had a pouch full of fake blood attached underneath her shirt as well as blood capsules in her mouth, which she manually punctured. Grantham recalled during the scene in which Hess's character tells her to "piss her pants," that she in fact urinated in her jeans. Steve Miner, who would later become a director himself, served as a production assistant on the film.