Can somene tell me why i had this dream?

So im 14 (boy) and in my dream my little cousin came over who i barely ever see and we were walking around the block about to go home when we crossed the street when a car full of teenagers (weird that i know this but the car was a green ford escort wagon) and it drove passed me really fast and someone in the backseat yelled out the window something rude so i yelled something rude back i dont want to tell what i said but then i ran to my house and locked the doors and ran to my room when oneof them (probably 5 teenagers total) came into my house and started shoving me so i ran to my room to get my BB gun i was going to shoot them for some reason i told the one in the house its just a BB gun so i ran down stairs and they were all standing at the open front door and i didnt have the courage to start shooting at them so i didnt but then i pointed it at one of them so he started kicking my puppy 😥 And then i grabbed my puppy and grabbed the keys to my car (My parents have an old honda that they said i could have when i turn 15 and drive) and i threw my pup in there and tried to drive away but i was afraid i would get pulled over so i just waited to see what they did and that was the end of it. Nothing close to that happened in real life

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