The demon is known as Bagul, and you may have spotted him in the film's clever poster design, hiding in a blood-smeared image on the wall. To get horror fans even more pumped up for Bagul's big-screen debut, the studio behind "Sinister" has unveiled a genuinely fun Facebook app that allows you to become the monster hiding in the poster. All you have to do is head over to the See Yourself Sinister tab on the movie's Facebook page, and you can upload a photo that will be transformed into a morbidly bloody demonic image. With just a few easy-to-read steps, you'll have your own signature "Sinister" poster that you can share with your friends on Facebook and Twitter.
To give you a little taste at how awesome the "See Yourself Sinister" posters look, check out this gallery of classic movie monsters that have been given the Bagul treatment.
"Sinister" makes it premiere this weekend at Fantastic Fest, then hits theaters on Friday, October 12. Ten very select cities are screening the movie next week; to find out if you are one of the lucky few that gets to see it early, head over to See "Sinister" First.