We planned to take a walk in Tai Tam Country Park (Quarry Bay Extension).Since it was raining,we decided to walk from Quarry Bay to Wanchai after having breakfast at De Coral,Tong Chong Street. On the way, we visited a second hand shop at Quarry Bay, the DSC new shop in North Point,crossing Victoria Park,arriving CCW Building to "dowood" the Octopus Card - saving two dollars to take the MTR. We also thought of where we had the lunch,at Mong Kok area, Prince, Sham Shui Po and how to cross the victoria Harbour, by ferry or MTR. At last, by MTR, at Central Restaurant at Sham Shui Po. That is why I could see the venue of this accident. When we were walking towards the restaurant, siren from ambulance,police car, flashing blue and red lamps were going into our eyes and ears at few hundred meters away from it. I saw that a girl,holding her cheeks, closing eyes and sitting on a wheeled chair was pulled to an ambulance.