We doubt there's a Houdini shell that has seen as much bottomless pow as the Rollercoaster shell set that belongs to Kazumasa "Junior" Yamada. Junior is part of the snowsurfing movement in Northern Japan, which originated on the island of Hokkaido in the 1980s. Rather than focussing on speed and freestyle tricks, snowsurfing is about finding the flow of the mountain, keeping speed through flat sections and becoming one with the terrain.