Chapter 5 contains everything from the stages of sleep to how drugs affect our consciousness. However the most interesting part in this chapter has to be about the "Unusual Experiences" of the consciousness. I mean sure, everyone has had a dream at least once in their life, but how many can say they've had an out-of-body experience (OBE)? I surely haven't. Many people during an OBE will simply just float above their bodies just watching themselves. Another part of this chapter discusses déjà vu, which I personally have experience numerous times, and how it is often seen in people who are young, remember their dreams, have a college education, and several other variables. Now, I am relatively young and I do remember my dreams quite well. I still remember a dream I had when I was in elementary school, I was sleeping on the couch and a bunch of witches flew out from underneath it and filled up the whole room like cramming people into an elevator. Sigmund Freud believed that dreams could be interpreted by looking at the hidden meaning, or the latent content of the dream. Now if he could come up with a hidden meaning behind the dream I had, I'd love to hear it.