Found a horror movie a couple of years ago which I thought was pretty good. It's one of those "found footage" types of horror films. It's in Japanese but it's subtitled.
Here's a review which I think would provide some pretext - Since they also tell you how to find it (At 2:46)
Originally posted by -SpectraL
Once the banks and the power grid goes down, you'll have to resort to eating people. You'll be so hungry, you'd eat tree bark.