User blog comment:Neowitch/680 - "Two men walk into a lab..." Stop me if you know that one!/@comment-3569609-20120905121605/@comment-4374114-20120905151902

That dragon is just in for a world of hurt, 3 strong swordsmen, all capable of cutting open a re-inforced wall with little effort. Kinemon keeps the fire breath at bay, Zoro takes the head, and Brook freeze dries the body for lunch later. It slices, it dices it, it juliennes dragon.

I'm guessing Vergo took a different path. As seen with Smoker and Luffy compared to how Brownbeard is going through building B, there may be a lot of differnt paths to go from one end to the other.