Watch full How to Train Your Dragon online full HD. Cartoon movies How to Train Your Dragon online for free in HD. fashions mechanical devices under his apprenticeship with Gobber the blacksmith, though his inventions often backfire. During one attack, Hiccup believes he has shot down a Night Fury, an extremely rare and dangerous dragon. Hiccup later finds it in the forest trapped in his bolas, but finds that he can't bring himself to kill the dragon and instead sets it free. Stoick assembles a fleet to find the dragons' nest, leaving Hiccup in a dragon-fighting class taught by Gobber. Hiccup returns to the forest to find the Night Fury still there, and realizes it is unable to fly properly because of its crippled caudal fin. Hiccup gradually tames the dragon and gives it the name "Toothless", for its retractable teeth. Hiccup makes a harness and prosthetic fin that allows him to guide the dragon in free flight. By studying Toothless' behavior, Hiccup becomes proficient in subduing the captive dragons during training. Stoick's fleet arrives home unsuccessful, but he is cheered by Hiccup's unexpected success. Astrid, a tough Viking girl whom Hiccup has a crush on, discovers Hiccup is training Toothless but before she can tell the village, Hiccup takes her for a ride to demonstrate his relationship with the dragon. Toothless unexpectedly takes the pair to the dragons' nest where they discover a gargantuan dragon named the Red Death2 that eats the smaller dragons unless they bring it stolen livestock.