In post-production, director James Wan discovered that he did not have enough shots or takes to fill out most of his scenes, so he and editor Kevin Greutert created their own filler shots by doctoring some of them to make them look as if they were filmed through a surveillance camera. See more

Goofs

In the beginning, when Adam says "This is what they do, man. They drug you, kidnap you, and next thing you know, you wake up in a bathtub and your kidneys are on eBay.", this is incorrect. Selling human organs has always been against eBay's Terms of Service. Adam is clearly being facetious in saying this, and this does not indicate that he or indeed the filmmakers believe that human organs could ever be sold on eBay. See more