Sometimes, during a dream, an alarming sense of danger invades you, though it is not based on anything tangible. It is possible that the unconscious is warning you that you suffer unknown physical problems. In other occasions, this danger materializes in a concrete situation (an accident, an attack, etc.), in which case you have to see what that particular threat suggests in order to interpret it.
Gallery of dreams
Improving memory can be done in a number of ways, and one of those is by having a good night's sleep. During sleep, your mind is still busy and going through the process of consolidation, where it strengthen your memories as well as the "practice" skills, which you have learned while you're awake. According to the associate professor at NYU Langone Medical Center, Dr. Rapoport says that something happens while we are all sleeping, and it helps us learn things better. Thus, if you're trying something new, you can perform it better right after you sleep.
Dreams reflect our actions that we have already performed. Most of us have dreams activities relating to our past life. One of the common dreams that every individual has gone through is their experiences during the school life, where you would get images of teacher hitting you, making you feel numb and shameful.