Lets speak about the psychological aspect of a street collision. You should differentiate two items. You must realize, whether your fight is a result of a usual domestic conflict, or you are attacked by a robber, killer or bandit. Your actions will flow depending on these circumstances.
If it is an everyday domestic conflict that happens in the street (someone pushed you or your leg, disturbed the queue order etc.), you should not use your fighting knowledge and skills to put your opponent out of action.
As a rule, all these conflicts occur because of trifles, and you need to behave normally in this case, lets say naturally. When this conflict happens, no one wants to fight actually, but just gets rid of the negative energy that was accumulated.
Those who express harshly their negative reaction are not dangerous at all in most cases. He will threaten you, make expressive gestures, grab you with iron fingers but nothing more will happen. This is nothing but the pose which does not contain real threat at all. However, there are exceptions in this case too. You must define at once who is dangerous and who is not.
I would like to precise one thing....