Armed with his Facebook page and a seemingly never-ending supply of stills, Vin Diesel is becoming a one-man publicity machine for his upcoming sci-fi thriller Riddick. Earlier today, the actor posted yet another new still, featuring his title character taking a blade to Karl Urban as Vaako. What could Vaako have done to incur such a wrath? Perhaps he stole Riddick's goggles, who knows. Take a look at this furious Furyan in action from director David Twohy's upcoming sequel.