Dreams are the activities of the cerebral cortex when it enters a shallow sleep state but does not really fall asleep.
Our brain is divided into many functional areas with very dense nerves. When the brain goes to sleep, it's not like turning off the lights, clicking and all going out. Instead, I gradually fell asleep. Therefore, the time for each functional area and each neuron to go to sleep is different. Even some functional areas are so excited that they can't sleep for a while. At this time, something interesting happened. This part is very exciting, and it's still noisy over there. That part was quiet. Turn off the lights and go to bed. The thinking of the human brain requires close division of labor and cooperation among all parts, so that some are asleep, some are half asleep, some are active and unable to cooperate. In this way, the active clutter signal becomes a dream. There's nothing to be surprised about.
There are many illogical places in our dreams, because the communication between the area responsible for logic and the area trying to judge is not smooth (for example, the nerve is resting and the logical function area is resting), so there is no logical judgment to filter some absurd illogical things, so absurd things will appear in the dreams. If you see yourself killed, but there is no pain; I saw myself flying. Wait a minute. When our brain is awake, it will filter out many things that are not in line with common sense, and it will quickly process many signals according to the speed of menstruation, which will help the brain to speed up its operation. So when you are awake, it is difficult to have these absurd "hallucinations", but they appear in your dreams. These absurd things, terrible things, nothing to be afraid of, and there will be no warning. don't worry