Heads up: If you've ever owned a dog, a cat, or a dragon, the final 20 minutes or so of How to Train Your Dragon: The Hidden World will reduce you to a wheezing, weeping, snot-soaked wreck, and because this will happen at the very end of the movie, as soon as you stumble out of the theater, everyone is going to know that a children's movie about friendly dragons just reduced you to a wheezing, weeping, snot-soaked wreck, and this is a thing you will have to deal with for the rest of your life. Another heads up: The rest of the movie isn't very good. by Erik Henriksen