Actually it is a very simple photomontage, but it shows that only a couple of details can do something very convincing.
Here is the trick of the 3D-Box, that is, a box lined with photographs, in this case produced by history channel.
once put in the right place, it's just a matter of taking the right pose.
and it's just a matter of inverting the image and putting a saturated frame to mislead. (instagram filters are also integrated here)