You never know what will happen in the next second, surprise or disaster. Last week I made an appointment with a doctor to check my fingers， make sure I took wallet and mobile phone and I went out. The weather is still freeze cold and I have stepped up. However, when I got to Swanston street to get on the tram, I found it a bit strange. Why did the noise constantly appear in the sky, and when I looked up, I found two helicopters. I wonder in my head. Is it what happened? After waiting for 10 minutes, there is still no tram. I looked up at the electronic sign and found a notice that was forbidden in the front. It was when I realized that there might have been an accident, but I still don’t know what the accident was. Car accident? Congestion? Or a parade? I started to move forward and found that there were more and more people in front of them. They looked a little nervous and I felt that it might be a bad thing. So I stepped up and wanted to know what happened in front of me. When I got to Chinatown, it was already at the end of the road. Many police and vehicles are guarded here to prevent people from entering. At this time, I heard people around me say that there was a terrorist attack and caused casualties. Unfortunately, the criminals have been arrested. The yellow word on the street sign shows: No trams are allowed. There was also a cordon around the road, and people were very curious about the situation. They picked up the phone and filmed it. But I still have to go to the hospital, I can only go to another road, it may take more time. Because the incident occurred on Bourke street, the entire street was blocked, traffic was getting crowded, and there were many pedestrians on the road. On the other side, I saw journalists who are reporting the incident. After that, I heard the voice of the ambulance. I guess there must have been a bloodshed. My conjecture has also been verified. In the news report, I saw two innocent people being hurt. I looked at my watch and it was time for the appointment. I turned and ran to the hospital.