i have same experience around one year ago. As i go to have a dinner, there is a man sudden running at my direction along the road, he knock me and tell me I break his medicine. Then, there are two men coming. One tells me it is a simple matter, and I need to aplogize. I say "sorry". Last, he points to a small hospital, and guide me to buy the same medicine for compensation. I just say "fuck your monther" and run a a fast rate. They call me and try to follow. I continue to run. Lastly, they have not chase me. The road is that everytime I take off the bus to go to my house at shenzhen. I just say as you face the same problem, don't talk, don't say sorry, leave this place directly. In case, you can scream but make sure you are safety. Don't pay money to them if you feel you are right. Don't let them HK guys are foolish.