Suspense analaysis "The Happening"

I was flicking through the channels and I found myself watching a film called "The Happening" this is a thriller movie that creates suspense, as in one part of the clip the man (one of the main character) is looking for the old women in the house and goes into the room and finds a doll placed on the bed and at first he is mistaken to think that it was the old women. "The Happening" is about a certain wind or plant that is massively effecting the human population, that's what makes the film more suspenseful as everyone would ask themselves "what is happening", this also flows very well with the title.