That stands in stark contrast to American riots of years past that usually lasted several days and almost typically concerned politics or social justice.
These days, college student-rioters usually have enough alcohol in their systems to overcome their inhibitions, but not so much that they are falling-down drunk, Lewis said.
Moreover, the violence is usually an expression of a feat of skill, he said. So where a basketball player might score a three-pointer to win a championship, the rioters hurl bottles or band together to overturn cars.



