Theaters playing this film gave free "barf bags" to the viewers.
The original ending was supernatural with the dead rising and pulling Christian into the abyss, but the second director hated it and had the negatives destroyed. The only remaining footage are stills that can be seen on the DVD release.
The US distributors of this film, Hallmark Releasing, advertised it as "guaranteed to make you sick" and backed it up with thousands of vomit bags advertising the film.
After it was already censored for its theatrical release, the film was banned in Germany from its video release in the 1980s until 2016. Only then, the banishment was lifted (after Massacre à la tronçonneuse (1974), this is only the second time this has been achieved).
Electric Wizard, a doom metal band form Dorset, England, used multiple samples from this film for its seminal "Dopethrone" record, released in 2000. The band also dedicated the song "I, The Witchfinder" to the movie, telling the story of an evil witchfinder falsely accusing people of witchcraft.