The rivalry between Boca Juniors and River Plate is insane.
I have a friend and pupil, a River Plate fan, who owns an advertising agency on public streets, when Boca and River played against (and River won). In the next morning the whole city awoke with a heavy joke against Boca Juniors….he paid it from his own pocket...
One day he met another student , a Boca Juniors fan, dressed with shirt, socks and shorts of Boca,a very expensive clothing down here….and I had to separate them so they did not fight.