Heres a couple of clips:
Steve Shelby slidin' an early season rail in Marquette, MI:
http://myweb.nmu.edu/steveshelbyfallrailgsp.mov
Ben Anderson grinding a rail we just built for Marquette Mtn.'s park:
http://myweb.nmu.edu/BenAndersonnat270off.mov
they might work
-Holmes
if its unnatural...