After winning the World Championship, the large crowd of fans became so excited, they started to overturn cars and set them on fire. This type of social dynamic is called:

collective behaviour; crowd psychology, mob psychology,

Explanation:

This type of behaviour refers to the spontaneous and sometimes erratic behaviour that is taken on my a crowd of people. This action is often unplanned and the individual loses its sense of responsibility and forms a single universal behaviour. This will increase as the crowd gets bigger. In emotional events such as the super bowl where there is already a crowd which understands that they are operating as a crowd and not individuals, they are more likely of have occurrences of these events. This may sometimes become dangerous destructive and may lead to loss of life in unfortunate cases.

answer; the automatic system because it is a "gut reactor"  

answer; recognition and measurement;