In this video it describes what was spoken about in chapter three. It speaks about the many instincts and reflexes that we humans tend to have. When you think of reflexes you may naturally think of say touching something hot and pulling away quickly as a normal reaction, or reflex we have. Or possibly when a doctor hits you below the kneecap and are leg tends to shoot forward. However, this video describes the many reflexes we did not even know we had! Reflexes as you may know are very essential and necessary to protect us when we sense danger and need to act quickly. This video show's that along with some other traits we have that we never really put a lot of thought into and wouldn't even know to label as a reflex!