This documentary about the squirrel mind is a great insight into the instincts of the interesting creatures, and how they perceive the world. After watching, I had a new point of view about animals and on our world and how we perceive it. The section about mentally damaged animals, focusing on a test subject, nicknamed Surly, was very interesting as well, and opened my eyes to the mental state of animals, and how very fragile it is, being held together by only instinct.