Violent Clouds and Storks

Pixar 2009 "Up" bonus short film. In Western legends, there is a bird named "stork", which is used to transport children. But where did the children transported by the Stork come from? It turns out that among the clouds in the sky, living clouds created these "children", and among so many clouds that created life, there was a sad "cloud" named "Gus". Its specialty is creating those "aggressive" children, such as baby crocodiles, ferocious baby porcupines and baby goats. And its partner Peck, a stork, is responsible for transporting Gus's "works" to the world. But as Gus's creations become more and more crazy, Peck's task of transporting these "dangerous goods" becomes more and more difficult, and every time he comes back, he is scarred. Until one time, when Gus handed him a baby shark, the exhausted Peck was so frightened that he flew away, and Gus cried sadly...