Having lived in Shenzhen (but really, it could've been any Chinese city), I saw many a traffic incident/something worse. One thing that stuck out was that no one was ever fighting or cursing at each other. Instead, they just did what every contemporary mainlander (human?) does and used one of their three (or more) mobile phones to call someone, anyone. If cigarette vending machines were on highway shoulders, vendors would make a killing.
Though, something that was a bit more unusual to me happened every now and then on Shennan Blvd. in the Luo Hu district of Shenzhen. Someone on crutches would walk up the middle of the road, coming from Xinxiu towards the city center. Now it's not possible as there's a (more and more ubiquitous) fence in the way, but beyond not having a kuai to pay for a bus, what other reason would there be?