Unfriended

Revenge finds its way online in this "found footage" horror. A group of teens are terrorised by an online presence seeking vengeance for the death of a classmate they shamed into suicide a year earlier. Told through a series of quickly shifting chat windows and social-media screens, our troupe of believable (and slightly unbearable) teens are picked off one by one. It's a ludicrous concept and there's not much about the film that won't seem predictable, but the enjoyment and terror comes in the execution. Instead of feeling gimmicky, the film makes the most of its format, crossing a slasher movie with the idea that the technology we so rely on can be used against us. For all its flaws, by injecting the sinister into something we are all familiar with, Unfriended manages to deliver a uniquely unnerving tone in a surprisingly traditional way. That may be where the profundity ends, but it is enough to deliver a satisfying chill.