Something quite extraordinary about Shanghai is that a vast majority of people speak rather loudly. In fact you may say they do not speak but they shout. You can be walking in the street and suddenly there is shouting going on. At first I thought there was a squabble but after awhile I realised that this is a very Shanghainese thing; it's normal to speak loudly.
And then once in awhile you'll come across a real quarrel which is almost a daily feature you'll find on the streets. At least it's true for the duration of my stay. This loud verbal combat can be really dramatic. Enjoy the following video clips : )