Despite its successes, 'Paranormal Activity 2' is still standard fare familiar to fans of "things that go bump-in-the-night" cinema. Objects mysteriously fly off the walls and chairs creak while dark shadows and off-screen noises amp atmosphere. Simply put, it's a good old-fashioned ghost story. So why the massive response? It's all in the delivery. The 'Paranormal Activity 2' modus operandi follows the original film, with the events unfolding on shaky hand-held camcorders and hidden cameras operated by the characters in the film.