In Thor: Ragnarok, Thor and Loki find Odin in Norway, but he's at the end of his life and after some heartfelt words, he dies. But instead of having his body fall to the ground, he turns into sparkles, which seems at least a little bit surprising to the brothers as they stand up suddenly to watch them float away.
Why did Odin turn into sparkles instead of just keeling over like us mortal humans? Do all Asgardians do that or was it something special about him?