2.Director Michael Chaves sees that The Conjuring movies are "love letters" to horror cinema and paid homage to several horrors like The Exorcist, The Shining, Psycho, and The Nightmare on Elm Street 4: The Dream Master.
3.Emerald Gordon Wulf was the stunt double and contortionist who was actually depicting David's exorcism, not CGI.
4.Before filming the exorcism scene, Chaves had the cast listen to the recording of David Glatzel's actual exorcism so they could capture "the reality of it."
5.The waterbed scene was also inspired by an actual event that happened to David Glatzel. In real life, when the Glatzel family moved into their new home, they said there was a bed left with a "strange stain" on the mattress and that's what they believed to be "the origin of the possession."
6.Patrick Wilson and Vera Farmiga actually found out the premise of The Conjuring: The Devil Made Me Do It back when they were almost done shooting The Conjuring 2.
7.The real Arne Johnson and Debbie Glatzel visited the set for a day and they got to meet Ruairi O'Connor and Sarah Catherine Hook, who play them on screen.
8.Ruairi O'Connor shared that he tried listening to Nine Inch Nails and other dark music so that he could stay in character as Arne, but he realized it actually made him "run out of interest [and] energy."
9.During the moment where Lorraine transitions from the real world to her vision in the woods, Chaves wanted to make it feel "organic and old-school," so he filmed it without any visual effects and did it totally in-camera.
10.Before she died in 2019, Lorraine Warren talked to Vera about David Glatzel's exorcism and explained how he created a numbered list of the names of the particular demons possessing him.
11.In between scenes, when the cast goes off on their own to decompress, Patrick will spend his time scaring Vera.
12.And finally, Michael Chaves considers this sequel to be the darkest Conjuring movie yet, solely because it's told from the perspective of a murderer.