I remember hearing about the rebolation awhile ago. As the article said, it was pretty much popularized by online videos on several different video sharing sites. It really made me think about how much the Internet affects how things get popular.
I imagine that before the Internet, rebolation might not have made it out of Brazil. How would anyone know about it without seeing it on the Internet? And even if someone did happen to know about the rebolation, it would be pretty hard to teach yourself how to do it without the help of a video tutorial.