If you are still trying to figure out how to nail those ultimate short turns and ski moguls with proper zipper line technique check this video out:
It should give you some ide of what movements to use and also how to practise off season. Key consepts are upper body remaining in place and facing down hill while the legs are moving underneath performing flexing and extending movements very quickly. Note that it does not really look like he is without skis only jumping down the in the rutt. Only goes to show that high end bump skiing is not about skis and turn shape. Important are the movements performed by the skier and the way he is able to take the physical beating. Jumping and slamming. Note that here is also living profe that the skier is totally unweighted at transition and that the transition is performed by retracting the legs.