"Polley's taste for horror, somewhat unsurprisingly, ran to more obscure movies than those of her costars, and found that their unconventional pleasures gave her better motivation than if she'd merely researched the endless string of slasher movies that have proliferated over the last two decades. "I love movies like Peeping Tom and those sort of classic movies, and I actually thought of that movie a lot while we were shooting this, about what is the most frightening thing is the look of fear. You realize as an actor you can just sort of wander through a movie like this, but actually you have to work harder in a movie like this than in any small character-driven piece, because your fear sells the audience on being afraid." Polley admitted that she did occasionally lose her way while filming the many scenes of death and dismemberment, but felt confident that the finished film was something George Romero would be proud of. "As we were shooting, I often wondered what was I doing, but I saw the movie last night for the first time, and I was shocked to see that the movie was exactly what they described to me that first time. Completely sick and twisted, and made by incredibly perverse people.""