A great effective film for this genre

Rating: Null/10 (27 July 2016)

A couple decide to document their nights while they sleep, after they hear strange noises that they believe to be haunting.
The construction of the film is genius. This is the effective way of thriller.
The occurrences are what in other contexts would be normal sounds, but without a visible source, they become frightening. But what really gets us is that many times we are unsure that anything happened at all.
"Paranormal Activity" is one of those polarizing movies that, for the most part, will simply either work for the viewer or not. When I see this film, I cannot sleep well.