Revision bcd7b15e-c9ef-46ff-b9e2-d365bc2cc87b - Meta Stack Exchange

These top users have the same cartoon rainbow unicorns in their avatar:

- https://stackoverflow.com/users/61974/mark-byers
- https://stackoverflow.com/users/218196/felix-kling
- https://stackoverflow.com/users/21234/skaffman
- https://stackoverflow.com/users/227665/codaddict
- https://stackoverflow.com/users/247533/rex-kerr
- https://stackoverflow.com/users/47738/rahul
- https://stackoverflow.com/users/417562/lonesomeday
- https://stackoverflow.com/users/40347/0xa3

What is this cartoon? Where is the connection with SO? Should I watch the cartoon to improve my skills?