Great discussion with DW Simon Otto and Paleontologist/Professor Stuart Sumida on HTTYD. My brother Henry, had to complete Flight School going into How To Train Your Dragon 2 and from his stories it was quite challenge to animate. A great walk cycle can be difficult to achieve, I can't imagine animating flight. So many aspects and little subtleties to a bird's flight....The smallest change in their wings and tails affect their flight and are constantly adjusting. It's definitely a film that captured flight so incredibly well!! One of the reasons I love the 1st film. Can't wait for the 2nd!