Originally, the zombie scenes were to be comprised of a couple of director Alfredo Salvatore Arcilesi's friends and family, but after creating the GET INFECTED! Zombie Day for the Feature Film Canswer Facebook Event Page and contacting and spreading the word with the help of the Toronto Zombie Walk organizers, hundreds of aspiring zombies applied. With nearly 100 partipants, the GET INFECTED! Zombie Day took place on Sunday, May 13, 2012 - Mother's Day, and was affectionately re-dubbed Mombie Day.
The opening title sequence featuring the ladder crashing into frame was the first and most vivid shot idea director Alfredo Salvatore Arcilesi had since the writing phase. Leading up to the actual filming and when finally on set, he was paranoid about the camera's safety, knowing that the ladder would have to land immediately in front of the camera. To ensure that no accidents would happen, Alfredo personally held the ladder to drop in front of the camera. Ironically, during the very first rehearsal of the ladder drop, Alfredo dropped the ladder hard onto the camera's lens mount, snapping it half off, thus, resulting in nearly $300 in repairs. Luckily, the camera itself was unharmed and principal photography was able to continue with a different lens.
Actor and zombie aficionado, John Migliore, had originally auditioned for the lead role of Cillian. Having learned of his undying passion for zombies, director Alfredo Salvatore Arcilesi invited John to participate as a member of the Infected Horde. Canswer marked the 17th (coincidentally, Alfredo's lucky number) film in which John appeared as a zombie. John would go on to not only provide his voice as a member of the Infected Horde, but also dub his voice in place of actor Eric Hicks who could not rerecord his lines of dialogue due to schedule conflicts.
Cillian and Ellen each wear a detail that symbolizes their character. Cillian wears a tie with a star pattern around his arm. Ellen wears a necklace with a charm in the shape of a key.
The school sweater-vest that actor Brian Quintero wears was the very first piece of wardrobe that he and director Alfredo Salvatore Arcilesi found at a local thrift shop. Coincidentally, the sweater-vest is from the exact same high school that Alfredo had attended. Its crest proudly advertises the school's slogan in Latin: "Fortes in Fide." The English translation is "Strong in (the) Faith," which is a perfect sentiment and one of several themes of the film.