When Lin Sue is pulled into the machine, the rollers visibly and forcefully crush her skull. However, when her remains are shown, her head has been severed but is otherwise completely intact.
Daniel Mantmor's character refers to Frazer's Golden Bower, The title of the book is The Golden Bough.
Mark incorrectly refers to a time in New England when witches were burned. This was actually a death sentence during medieval times in Europe, when someone was convicted of witchcraft. Colonial witch trials carried out the death sentence by hanging.