Legend of the Boneknapper Dragon

The Legend of the Bonenapper Dragon is a short 15-minute film with the How to Train Your Dragon Blu-Ray disc.

Plot
At the beginning, a fire is seen blowing inside Gobber the Belch's house. Various dragons are seen flying and dumping water over the house, and eventually Gobber comes out of the house and claims that the boneknapper dragon caused the fire. Stoick the Vast refuses to believe, but Gobber persuades Hiccup and his friends to help him search for it.

While traveling on a boat, Gobber reveals his backstory of how the boneknapper dragon hated him. He revealed when he was a teen he was in an ice cave, and noticed a frozen viking holding a treasure. Once Gobber grabbed it, the boneknapper chases him until Gobber escapes with the treasure box.

Meanwhile, after riding a boat for a while, they end up crashing and get stranded on an island. Gobber explains his second encounter with the dragon, when he was stranded on an island. The boneknapper pursuided him and Gobber escaped even though the ocean was filled with Hammerhead Sharks. Then, since they are stranded, they decide to search for the dragon. The group uses Fishlegs as bait to catch the dragon.

While they are waiting, Gobber tells his third encounter with the dragon. He was in a forest, and the dragon chases him while he was in the forest. Gobber lept over a volcano, and a Hammerhead Yack jumped and saved him. The boneknapper still survived, and chased Gobber all the way to a cliff, were he was saved by a hammerhead yack riding a hammerheadd shark.

After the story, the boneknapper dragon finally attacks. As the vikings battle it, Hiccup figures out that the treasure that Gobber found (which is a belt buckle made of a bone) is what the boneknapper dragon wants. Gobber eventually put it into the dragon's skeleton, the boneknapper befriends Gobber. After he is happy enough, they ride the dragon home.