First of all, I hate the term "extreme carving" for many reasons (MN folks know why). However, I do like to drag various parts of my body on the snow. Much like dragging a knee on a sportbike, I use my hands/forearms as a feeler and try not to put much weight on them.
I love high speed and high g-force carves, I don't know how to accomplish those things without dragging body parts through the snow.