The blood used in the film is the same Kero Syrup-based blend used in the original Evil Dead. The director found the recipe within actor Bruce Campbell's autobiography, If Chins Could Kill: Confessions of a B-Movie Actor.
Due to the low-budget and time constraints, Dr.Lambaugh's home was not only used as a set but also as the place where the crew slept, ate, and showered.
While filming a scene involving a car accident, the town sheriff was called to set due to concerns from a local farmer involving large amounts of fake blood scattered about the entrance to his farm.
The name of the protagonist was meant as a homage to Butch Cassidy and the Sundance Kid (one of the director's favorite films). In the film, The Sundance Kid tells Butch his real name is Harry Longbaugh. Only after finishing the final draft of the screenplay did the director/screenwriter realize he'd used a similar, albeit an incorrect, name Henry Lambaugh.
During pre production Brett Hatten (the film's director) made his Director of Photography watch The Insider (1999), The Thin Blue Line (1987) and The Conversation (1974) to better understand the kind of mood he wanted from the look of the picture.