scary experience

I had a scary experience when I was 10 years old. There is a slope front of my house. The slope’s length is about 80 meters and little sharp. I and my sister often play there. My sister was 5 years old. One day I and my sister think that let’s ride on bike together and run a slope! That’s interesting. We sat the half seat each other of bike and my sister sat front of me. I had a handlebar. We started run but the bike speed gradually fast. Then my sister fall down from the bike and crying. I lost my balance and rolled over with bike. My sister had injury at forehead and I had injury at foot. We went to the hospital and undergo treatment. My sister had stitches when she was very crying. My injury was slight. I am very sorry for my sister. My mother was very angry. I decide to that I never ride on bike together and I will never injure my sister body.