I felt VERY sorry for the dragon. Goblins are sick puppies when it comes to training dragons. Look at this line:

"The dragon let out another hoarse roar, then retreated. Harry could see it trembling, and as they drew nearer he saw the scars made by vicious slashes across its face, and guessed it had been taught to fear hot swords when it heard the sound of the Clankers."

Hot swords. They torture dragons with HOT. SWORDS.

Is it quite all right if I got be sick now?