Is this a hoax?
BASE jumping is insanely dangerous - just watch this video for how it can go terribly wrong.
So quite why you would up the ante and attach the harness directly to your back using four hooks inserted THROUGH YOUR SKIN is close to incomprehensible.
But oh well, these Russian chaps seem to be having a laugh doing it.
They are 'The Sinner Team' from Moscow.
And they are mental...