As Buzzfeed points out, this footage from the Taxco Urban Downhill in Taxco, Mexico makes that dirtbike scene from "Skyfall" look like mere child's play. The two bikers travel down a mountain, through narrow city roads, and over what appears to be several makeshift bridges strung together by, like, six pieces of bamboo.
Needless to say, it's terrifying. (The helmetcam dude couldn't care less, though. Yes, that's a shaka sign he throws up at the one-minute mark.)