Perceval saw the dragon's head, and it was huge and great and terrible, but he met it with his sword and thrust it into the roof of its mouth as straight as he could. The dragon's head uttered so huge a cry that the whole plain and forest rang with it for two leagues abound. And the dragon's head turned upon its lord in a rage and consumed him in flame and burned him to ashes, and then vanished like a thunderbolt.

Perlesvaus