This looks to be a very cool demonstration of the power of this track excavator. The tower is obviously special made for this feat and appears to include locking points for the plate on the end of the arm, and places to wedge the tracks as the arm moves up to the next level. There is vigorous discussion on Gizmodo debating whether or not this is real or photoshopped, but I can easily believe that this was a real demonstration (although they may have removed the counterweight from the excavator). This desperately needs a video! …and yes that guy must have b*lls of steel!
Here is one more blurry photo from German TV that would seem to verify the stunt as real.