1. Dreaming is actually just a normal physical and psychological activity that everyone has, so don't worry too much. Generally speaking, dreams do not predict anything, that is to say, nightmares and dreams are not much different, nor are they dreams, or the opposite. Therefore, as long as you regard it as an ordinary dream or an ordinary story made up by yourself, don't worry about what it will imply or predict because of its content, which will increase your psychological burden, flatter yourself and be self-righteous for no reason.
2. Freud, the most famous psychologist in the world, also pointed out in The Analysis of Dreams that dreams are actually the reaction of your psychological activities, and dreams are generated from your heart, which is quite correct. Judging from your dream, you love your mother very much and hope your mother can live a comfortable life. Perhaps, the life you used to live with your mother now has not achieved the goal you want. Now your life should be relatively well-off, but it is not very well-off. You always want your mother to live a good life, and sometimes you feel that you are living a comfortable life like this, and your mother is still suffering, so you will feel psychologically uneasy, or feel guilty and guilty, but the reality is that you can't solve some difficult situations in your mother's life immediately. For example, you don't have a house, but you really want to have a house, so you will have a house in your dream; More broadly speaking, the house is actually just an agent, which can be a car, a large LCD TV and other material goods.
Take a guess, if it doesn't fit your situation, please don't take it amiss. Your mother may be living alone (single), lacking in material and psychological resources. For example, you may feel insecure and lack a man (such as your father and your eldest brother, who can play a pillar role in the family), so sometimes you will feel helpless and lack care and help when you encounter family events and emergencies. So in your dream, you ask the motorcycle driver for help. They hesitated, but they finally caught up. In my dream, a policeman appeared and asked why your mother didn't run to the police station. You want to get help from others in real life, which is also your wish. I hope that many people will help you when you are in trouble and need help, and have a reliance and sustenance.
You love your mother very much and want to protect her. On the one hand, in real life, your love for your mother has not been fully revealed. Maybe some people still don't understand how much you love your mother. Some people even said that you didn't care enough about your mother and let you know. You feel humiliated and confused, and feel that there is no chance for you to show your love for your mother. So, you created this fictional scene in your dream. In this case, you love your mother, care about your mother and protect your mother. Even if you bite to death for her, you dare to admit it in front of the police and bear the consequences. When your mother loses her hand, you are willing to be her hand and scream until you can't make a sound. These plots vividly reflect your love, care and protection for your mother.
5. One more thing, dreams come from the heart, thinking about them day and night. For this dream of yours, I suggest you carefully recall the memory, plot or content of the dream. Maybe you've seen TV, newspapers or heard it before. In short, the contents, plots, and objects of these dreams should be the ones you have touched, or the ones you conceived or thought about when you were not asleep. It's just that after contact at that time, it may be just a flash, it may be more than ten years ago, or it may be triggered by some unconscious stimulus and suggestion recently, and I had such a dream.
6. To analyze this dream more comprehensively and correctly, it is difficult to analyze and grasp it comprehensively only by your narrative. More and deeper communication and understanding will help to further analyze your dreams.
The above answer is purely personal, please forgive me if there is anything wrong! I wish you happiness.