This last Friday 25th February 2011 a Critical Mass event was held in Porta Alegre in Brazil, as I am sure many of these same CM rides were held in various parts of the world.
This one ends in a horrific manner. A car driver deliberately drives at high speed through the crowd of cyclists and keeps on going.
I was sent the link to this video by Juan Salazar, a regular reader of this blog. He gave no details of casualties.
I later found this report, and miraculously no one was killed, eight were injured, one female was seriously hurt. The driver later abandoned his car and fled the scene.