Last night I watched my hometown soccer team Gremio lose at home to Santos, one of the better teams in this year's Brasileirão. Attending a soccer match in Brazil is quite a unique experience, and nothing like what I've gotten used to in the US.
Americans expect assigned seats, electronic scoreboards, and beer (albeit at ridiculous prices). Ticket prices go up as you get closer to the field. Fans of the visiting team seat peacefully amongst the hometown fans, and although occasional swear words are exchanged a physical altercation would be highly unusual. There is a sense that if something bad happened, emergency exists would allow for an orderly evacuation.

In Brazil, the bottom half of the stadium is general admission, and also the cheapest tickets in the house. You just have to put up with the occasional moshing, fireworks, smoking, and general revelry. There are no scoreboards, but since soccer is a low-scoring game that's something one can live with. Alcohol on-site has been banned after apparently one too many bad experiences. Not to imply that fans are sober; plenty of drinking happens beforehand on nearby bars and out in the streets. There is a 10 feet deep moat with barbed wire between the fans and the field, yet apparently fans still somehow rush the field after major victories. The visiting team fans are isolated in their section, separated by 12 ft high fences, to avoid any potential conflict. There is a sense that a riot could break out if the referee makes a particularly controversial call - the rows of military reserve police with guard dogs seem to be there for that reason.
