Paranormal Activity - Official Trailer 2 [HD]

At the moment I am researching different horror/suspence film trailers, to gather what sections they use like the effects and sounds effects. I will carry this on when I create my own horror/suspence trailer.

For example this trailer here is from the film Paranormal Activity. This is a film, which is then followed by the sequel Paranormal Activity 2. This trailer I like as it tells the story well, but not giving the plot away. This trailer adds suspence throughout, and making clear that it is filmed using hand held camera, brings the viewers in. The sound effects used in the background highlight the main sections as well as adding suspence.