Revealing mistake: When Austin goes to write the Roman numeral "XVII" on the chalkboard, the erased numerals from a previous take are still visible where he's about to write it. (00:41:36)
Directed by: Andre Ovredal
Starring: Brian Cox, Emile Hirsch, Ophelia Lovibond, Michael McElhatton
Genres: Horror
Revealing mistake: When Austin goes to write the Roman numeral "XVII" on the chalkboard, the erased numerals from a previous take are still visible where he's about to write it. (00:41:36)
Other mistake: When the Sheriff arrives at the end, his car has Pennsylvania license plates but we have been told that the setting is Virginia.
Emma: What's that for?
Tommy: To make sure he's dead. There used to be a time it was hard to tell a comatose person from a dead one, so coroners tied bells to everybody in the morgue. So if they heard a 'ting', they knew somebody down there wasn't quite ready to go.
Emma: So, why do you have one?
Tommy: Well, I'm... I'm a bit of a traditionalist.