Uchh, people who monopolise seats on the subway are the worst. An altercation broke out on Guangzhou Subway Line 4 after a 67-year-old retiree asked a young man to give up his seat. When the youngster refused to move the older passenger (entirely reasonably) started biting him. Subway security eventually intervened, and the police were called. The 28-year-old lost a piece of his ear but learned a valuable lesson about not fucking with old men on the subway.
(h/t: Beijing Cream)