Check out this clip on YouTube which claims to be of a cyclist weaving through traffic in Mexico at high speed. Truly incredible – it seems almost impossible that it can be someone on a bike doing that. But then I also saw this clip of a similarly insane cycle courier race in London.
It turns out both were made by Lucas Brunelle and you can view these and other videos on his own website. Also worth checking out the photos for (amongst other things) a couch bike and an amphibious bike. There should be more people like Lucas in the world. Life would be more interesting, if maybe a little more dangerous!