Omg same thing happened to me. When I was 10, me, my younger sister, and my friends were riding down a dirt road on our bikes. I accidently fell off my bike and I saw my sister speeding down a hill and ran over my leg. Then I wanted to run her over with a tank. If I had one. Then I had another injury after that. I was walking my bike down my friend's driveway (And their driveway was partly a hill) And I stubbed my toe. It was sure "fun". :')