I knew my head was colliding with the road. However, I was wearing a helmet. After the impact passed away, I felt I was OK, but at the same time I thought that if I had not worn the helmet, I would have died there. I immediately stood up, and found that there was no broken part in my body. I moved my bike to the roadside. I murmured to myself, "Never jump again." Soon I felt a severe pain on my right elbow. I found that the right side of my helmet was broken into two pieces. I thought I was really fortunate. I rode my bike a few more hours. **