Generally it takes a horror movie a chunk of time for it to start being scary. You have to establish a spooky atmosphere, a sense of dread, and then let the tension build to a breaking point before you really start turning the screws on the audience. The new trailer for Saw and Insidious director James Wan’s latest film, The Conjuring, however, proves that this isn’t always necessarily the case.

Through the use of a couple of tried and true tricks, like establishing the protagonist’s vulnerability and forcing them to confront the unknown, this little horror movie ad is able to conjure up scares in a mere two-and-a-half minutes. It’s so effective that it practically works on its own as a short film. Check it out after the break:

Will Wan be able to keep the scares up over the course of an entire feature film where he has to spend time introducing this huge family and explain why they’re moving into this house?

We’ve got a while to go before we find out, because this thing isn’t set to hit theaters until July 19th, but while you’re waiting around for summer, here’s a little bit of truth to mull over. The trailer says that The Conjuring was based on a true story. You know what that means, right? Oh, my God, ghosts are real, you guys!