You know this technically isn't a crossover. Hiccup and his family are Vikings. Thor, Loki, Odin etc. are Viking gods. So like all the bad luck on Hiccup could've been Loki messing around. XD How to train your Dragon Norse / Viking Gods
I asked my brother last night if it would be possible to jump from a trampoline into the top bunk of a bunk bed. He said nothing until I said, "Thor can." His reaction?" lol My mom is letting the Avengers influence us WAAAY too much.