only similarity I can see between big mountain and surfing is slashes.  Do tell what these tricks we are seeing have anything to do with surfing.  the only tricks I see in surfing are derived from skating, which is derived from surfing (wave->halfpipe->wave).  Nothing to do with skiing whatsoever.  Newschool comes from skating, which as I may remind you comes from surfing, but big mountain has nothing to do with surfing.  Skiing has been a sport for quite some time.  Maybe as long as surfing, I dont know, and Im not going to look it up.