Dangers of being a taxi driver

I was on my way with a few colleagues to North Market yesterday morning travelling in a van on Renmin Nanlu. In front of us was a taxi and the morning traffic all around was brisk and heavy. Suddenly the passenger side door of the taxi in front flew open and a man threw himself out of the moving taxi, crashing and rolling onto the pavement and then leaping to his feet. We slowed down and drove carefully around him, avoiding hitting him. He didn't have any shoes on and had a switchblade in his right hand. He was in his 20s and stared wildly around, brandishing the knife in the air. As we drove by we could see the astonished face of the taxi driver staring at him. The last thing we can see through the rear view mirror is the crazy man jumping onto the roof of the cab as all the other cars try to drive around the stopped cab....