The Fans Were Mad That Day, My Friend

I've gone off a few times on soccer fans before. They're crazy, insane, psychotic, etc. We all know that. But this is a new one for me. I'm not 100% sure where this video is from - Argentina or Brazil (or maybe the Middle East, I'm not sure, I can't tell from the accents) - but it's very recent. It's somebody wandering down the inner hallways of a soccer stadium only to discover something ... [link]