A class made me understand the truth; A lesson enriched my knowledge; A class gave me experience. It was the National Day holiday, and my mother and I were on duty at work. Along the way, because of a little excitement, I can play computer all day today. I've been talking nonsense, and I'm still dancing when I'm in the car, so I can't concentrate. At this time, a bicycle came quickly behind me, which made me feel at a loss and shook the handlebar. My mother rode beside me, but I didn't know my car was going to fall down. I knocked my mother down. Mom was in pain, and I stood there stupidly. I didn't help my mother get up right away, and I muttered, "It's not my fault. Someone rubbed me next to me and shook the handlebar." At this time, I remembered yesterday when I went out riding with my parents, and my hands sometimes left the handlebars. My parents always told me to be safe and not to leave the handlebar all the time. I'm still very proud. I think my cycling skills are really high. Adults tell me they have their reasons, but I always don't understand them and think they are nagging. This time, because I didn't remember the usual admonitions of adults, the lesson fell on my mother. Mom went to the hospital to check that a rib was broken, and I saw that she was in pain. I feel a little guilty inside. On weekdays, my mother takes care of the life at home, making my mother lie in bed and can't even turn over, with some slight vibration. Mom said, "Fortunately, you hit me. If I bump into an outsider, how can I tell others? " This lesson has been lingering in my mind, reminding me of it and making me feel terrible. Since then, every time I drive on the road, I am very focused. Especially on my own way to school, it is the rush hour, so I pay more attention to safety. Learning from mistakes, children of our age are all thumbs, don't listen to adults, and don't know how to deal with things. Experience tells me: don't do anything illegal. If you do, the consequences will be unimaginable.