Watch an eerie clip from Ti West's The Sacrament

The Jonestown Massacre is undoubtedly one of the most horrifying documented cult cases ever.

And it's the basis for Ti West's new horror The Sacrament, in which a Vice documentary crew gets exclusive access into a mysterious commune. Predictably, things do not cheerily.

Our exclusive clip shows the moment the penny starts to drop, and shocker - everyone on the comune may not necessarily be there through choice.

The Sacrament is in UK cinemas and available on VOD from today.