It's... wind turbine base jumping dude!

Heh heh, check these guys out! It looks like someone has found the quick way down from some Vestas V90-2MW turbines in Germany (they have the distinctive tip marking) - or maybe they are pioneering some innovative maintenance access techniques? Either way, I'm sure the wind farm owner wouldn't be too happy if they found out! If you really gotta do it, points to note:

• Make sure the manual rotor lock is on (it's bright red man!)
  
• Don't kick off the trailing edge like those guys did (it's a delicate laminate dude!)