The possessions that happened in 2010 which are mentioned by Father Canetti, are the Devils from "Pastorela" (2011).
A spiritual sequel to the film "Pastorela" (2011), which was also directed by Emilio Portes.
This film and Roma (2018) are the only Mexican films to be recorded with a 7.1 or higher sound mix.
Luis Carlos Fuentes, the script author, has also published two collections of short stories that are also based on dark humor/scary topics.
About 41 minutes into the film, a cinema marquee is shown. Amongst the (Spanish-language) titles, the title "Nos Vemos el Miercoles" can be seen. The English translation of this is "See You Next Wednesday", the film title notorious for featuring in many John Landis films.
