As I took a looked through chapter 5, what most grabbed my attention was the section that talks about dreams. People can recall their own dreams, but some may say they don't remember because they can't recall their dreams but research shows that most don't recall their dreams, therefore they think they don't dream. The part that grabbed my attention right away was when it explained how blind people dream and beginning at the age of 7 is when people began having visual dreams.
There still does not fully exist an explanation of why we dream, but scientists have come up with evidences that dreams are involved with processing emotional memories, a virtual reality of the world, etc.
Anyone can have a nightmare or a bad dream, though it is mostly common with children but adults could have them too. As said in the text, "90 percent of dream reports are straightforward descriptions of everyday activities and problems," (p. 175) This means that almost all the time the dreams that a person has will be based on what occurred that day.
I have experienced this lots of times, for example last semester i had 2 finals in one day and later that night when i went to sleep i had a dream about the finals. I dreamed that I failed both finals and was sad because i studied really hard but then i woke up and realized it was all a dream. The take away from this is that i believe a person dreams of what they are thinking all day about and go to sleep thinking about it and also, think about its consequences. My problem was that i was worried if i did good or poor on the finals but in the end I found out I did good in both finals.