Spoiler Alert! I think this particular short film is about birds and some of them might be angry. Still I have to admit I quite enjoyed it. I watched it twice.
Just a little reminder here. There is a purpose to all of this. It is to make us happy. It is to encourage us to be nicer to each other. It is to prepare us for later posts that are related to this material.
If you are interesting in learning a little more about how Pixar came to be you can hear it here.