riots, are often violent and outwardly focused. Examples are football riots and the L.A. Riots of 1992. Escapist mobs are characterized by a large number of panicked people trying to get out of a dangerous situation. Acquisitive mobs occur when large numbers of people are fighting for limited resources. An expressive mob is any other large group of people gathering for an active purpose. Civil disobedience, rock concerts, and religious revivals all fall under this category. Movement dynamics Studies have shown that human crowds move in ways that resemble fluid, and can be modeled by such methods as particle simulation and statistical physics. Similar observations have been made for car traffic and the movement of ant aggregations. See also References Citations Sources and further reading online Borch, Christian. "The exclusion of the crowd: The destiny of a sociological figure of the irrational." European Journal of Social Theory 9.1 (2006): 83-102 . Feldberg, Michael. "The crowd in Philadelphia history: A comparative perspective." Labor History 15.3 (1974): 323-336. Hoggett, James, and Clifford Stott. "Crowd psychology, public order police training and the policing of football crowds." Policing: An International Journal of Police Strategies & Management (2010). Rudé, George. "The London 'Mob' of the Eighteenth Century." Historical Journal 2#1 (1959): 1-18. online McClelland, John S. The Crowd and the Mob: From Plato to Canetti (Routledge, 2010). External links Understanding crowd behaviours