Throughout chapter five, Lilienfeld touches on the different stages of sleep we go through each night. Along with these five stages of sleep, chapter five includes explanations about different kinds of dreams and sleeping disorders. Particularly interesting was the idea about "lucid dreaming" and how our minds realize that we are dreaming. I think it is odd that we only experience these types of dreams once or so a month. I find it ironic because we know we are going to sleep, so how would we not realize it is a dream. Another thing I was interested in was the sleep disorders, especially insomnia. I'm interested in it because I feel like I have these disorder to an extent because my sleep habits are so unusual. Chapter five also touches on things like out of body experiences and near death experiences. These are especially interesting because out of body experiences are in a way dreams within a dream. It brings into mind the movie Inception and how dreams in a dream could be possible. The near death experiences could be compared to a dream while we are not asleep. It depends on the person, but near death experiences generally change depending on the person's religion. I think one of the most interesting thing this chapter touches on is déjà vu. I think this is the most interesting because most people have had an experience at least once in their life.