Spoilers follow ...

Rating: 7/10 (19 May 2017)

The effects of 'The Blair Witch Project (1999)' should never be underestimated in my view. With it came to many peoples' attention a whole new way of telling (mainly horror) stories: found footage. It was a phenomena, a huge low-budget hit. The inevitable backlash from the fickle public mainly whinged about the effects of 'shaky' webcam making the delicate souls in the audience feel queasy. Imagine then, if a film could be told using static security cameras endlessly filming every room in a haunted house. Perfect! For a limited time, it was certainly very effective.
Katie and Micah live in the unlikeliest haunted house. No dank corridors or Victorian era décor – this is a thoroughly modern homestead devoid of dank shadows and possessed cellars. The couple are likable and real, and Katie Featherstone and Micah Sloat are naturalistic performers and have a certain casual chemistry. The production is genius in its simplicity. Watching stilted views of familiar rooms command the attention, dare the audience to examine every inch of the scene for any sign of unnatural movement – and even if nothing happens, there is growing tension merely in being so drawn into it.
Micah's scepticism in the face of visiting psychic (Marc Fredrichs) marks him out quite early as fairly vexatious, especially when Katie seems to have been sensitive to paranormal activity from a young age. And yet every horror film needs a sceptic. I remember being very irritated by him when I first saw this, but watching again, I find he is a lot more understanding than I gave him credit for.
Unspectacular occurrences are a lot more effective because they are filmed as 'live', and we get the couple's instant, undiluted reactions to them. The scene where Katie is simply standing beside the couple's bed, staring at Micah's sleeping form, doesn't sound much on paper, but is incredibly sinister. Such moments, gradually built up throughout, are simple and unnerving – far more so in this film than in the numerous sequels and prequels, which desperately introduce new characters and build unreasonably on the 'curse' (which is not that interesting) to try to maintain the interest. To my mind, the only sequel that works is 2014's 'The Marked Ones', because it is a fairly self-contained ghost story in its own right.
Yet 'Paranormal Activity' should have remained a very effective one-off, in my view. Its huge success persuaded Paramount Pictures, who had bought the film from its original independent distributors, to add a new ending, which would then lead into further numerous ways of wringing money from what had become a new franchise.
At the end of my first viewing of this, I had to turn all the lights on in every room, just to make sure there wasn't a figure standing there. A sure sign the film has done its job ?