10. Tears
Dragon's couldn't cry. It was a fact, there was no changing it. It was physically impossible. Yet as the Night Fury looked upon his rider, he desperately wished he could, if only to alleviate his friends pain. His rider shed enough tears for the two of them and then some. He shed them over Toothless's missing tail fin. He shed them knowing he had caused it. Hiccup shed them over his missing appendage and the pain that came with it. He shed them over his dead mother, over the pain and suffering he had gone through, an over his over bottled emotions. He shed them over Astrid who, in the end, had chosen Snotlout over him. Most of all he shed them because he had seen it coming and done nothing to stop it, praying to every god he could think of that he was wrong, horribly, horribly wrong. Hiccup shed many tears and it broke the Dragon's heart that all he was capable of doing was cuddle, nuzzle and try his best to comfort his rider through them. Yet deep down the dragon knew he'd never be able to take the pain away and it made him 'cry' and whimper alongside his rider.
Disclaimer: I DO NOT OWN anything pertaining to the franchise or story of "How to Train Your Dragon"