A Boston Phoenix feature on freerunning
http://en.wikipedia.org/wiki/Parkour
http://video.google.com/videosearch?q=parkour
via
http://www.livejournal.com/users/mathemajician/141869.html
http://www.livejournal.com/users/vi_z/192929.html
http://www.livejournal.com/users/bbb/1446766.html