Alright people ... before you all go freaking out I will point out some things I notice about this picture and why it is fake.
If I am wrong - whoa is me....
1) There is zero necrosis of the tissue ... I don't even see inflammation.
2) A wound like that would compromise the vasculature of the extremity in some way or another yet I see no discolouration due to shunting.
3) It's way too clean. That looks like a degloving kind of wound where the flesh is literally peeled off the muscle. Anyone who has seen a serious motorcycle crash knows our skin turns to hamburger meat and does not flay as it appears here.
4) Something about the anatomy of the foot doesn't look right. I've seen a human foot in a not so pleasant way and when the tissues and bone are all exposed ... it doesn't look like that
Those are just my case and points so you all can keep your lunch down. I think some one was having fun with photoshop or this picture is something totally different and not what people are making it out to be.