This shyt is so impressive. I've biked urban, suburban, wooded trails, gotten air jumping shyt, 34 mph going downhill on the Manhattan Bridge... I've biked. But when I see people doing shyt like this and knowing the potential consequences if something goes terribly wrong has always kept me from taking it to that level.
Wifey freaks out sometimes when we bike together. I move faster and more decisively in densely populated areas. I guess what I'm trying to say is that there are levels to it. People who do this shyt are on another plane.