After (or before) watching or visiting the football match, some Russian football fans like to go out, gather in groups and fight with each other. They call such fight a "mahach", from the word "mahatsia", which means to fight with somebody. Here are the pictures and the video of the typical fans "mahach" that took place in Rostov-On-Don. Probably this tradition goes from the ancient Slavonic fisticuffs; it was a real national
fun in Ancient Russia when village met village each weekends in a row on row boxing fun. So in modern Russia it's not considered to be violent like a corrida (bullfight) in Spain or Boxing in USA, it's the same like a boxing but at the same time hundreds of athletes fight on their good will. Maybe someday organized crowd row boxing would be included into Olympic Games official sports list?