First of all, you don't need to think clearly about the logic in dreams, because many of our dreams are quite absurd. What you need to find out is what the image in your dream represents in your life.
The first is the swimming pool and your friends. In my opinion, the swimming pool represents a small circle in your life. It's crowded and crowded, which shows the complicated interpersonal situation in your life now, and these complicated and crowded interpersonal relationships should make you feel stressed. Your friend is deeply involved. Your friend seems to be having a little trouble recently. Or you broke off contact with your friends because of some things, such as some emotional problems and so on. You are eagerly waiting for your best friend to come up, which shows the deep feelings between you and him (her).
As for many bodies, my first reaction was the Wenchuan earthquake, because only the Wenchuan earthquake brought us such a scene recently, and your account also said that the reason was the earthquake, so I guess here that the Wenchuan earthquake (or other earthquakes) brought you great fear.
The truck without brakes, the investigation and explanation of the country, the cover-up of the truth, and your self-report, I think this image can be interpreted as the Wenzhou bullet train accident. Your anger on Weibo shows your concern for public events.
If you are not a survivor of the July 23 incident, my conclusion is this:
You are a person who is very concerned about current events (or your surroundings), and you are particularly concerned about the safety of current events (your surroundings) to you and your friends. You should be less insecure, always pay attention to the changes around you, and pay attention to what changes have brought you. At the same time, we should have a sense of responsibility, care about our country and our friends. However, it is this sense of responsibility and insecurity that makes you afraid of similar disasters and makes your life full of stress and tension.
My suggestion is that it is a blessing, not a curse, but a curse. Why worry?