They're from Marat Dupri in Russia, where apparently their photo trend isn't planking, it's climbing on insanely high things and capturing the surroundings. [Side note: Their trends are clearly way cooler than ours.]
Just LOOK at these!:
Those first two... holy CRAP. I do a lot for videos, and I'd probably feel the same way about pictures, but that's pretty effing scary.
Bravo, Russia. You win.