Animated film short by Dreamworks Animation that is a sequel to the feature film, How to Train Your Dragon: The film opens with Gobber's house on fire and the Vikings and the resident dragons getting it under control. Gobber is convinced that his old nemesis, The Boneknapper Dragon, is responsible, a giant dragon that clothes itself in dragon bones like armor. However, no one believes him, especially when the evidence suggests that the fire was started by his underwear drying at his hearth catching fire..