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Pardon me if I'm just retarded and should know this already, but How did grinding rails on skis start. Like, who was the first person to think "hey I should go sideways on that metal rail" and also who invented tech stuff like switch ups k Feds and 270s In/out? I think snowboarding probably did it first and definitely it started from skateboarding, but who was the first to do it on skis?
