We don’t know what kind of disturbing thoughts go on inside the minds of James Wan and Leigh Whannell, but one thing is for certain: The creators of the Saw franchise make scary-ass, and successful, flicks that keeps both audiences and the studios happy. The duo’s latest film, Insidious, meshes a traditional haunted house set-up with spooky imagery straight out of an early '70s horror movie. It could get shoved aside as a cliche supernatural ghost thriller, but the early word from the horror blogosphere is that Insidious is the real deal. Needless to say, we're pretty amped. Check out the teaser trailer for Insidious, which opens on April 1, above.