think of if you jumped and did a spin normally with just your feet on flat ground. Whether you know it or not, you pressure one foot forward and the other backward- specifically, you push forward on your right foot if you are spinning to the right, and vice versa.
Now apply that to skiing. You need something to grip and push off of if you want to initiate any kind of spin, which is where scissoring comes in. You use that front inside edge to get a platform for the rest of the body to push from. You never really "push" that foot into the rail, just use it to move the rest of your body. Then of course, use your arms, turn your head and shoulders, hop, let hips follow, etc. Just try it a bunch of times, you'll get the feel for it.
...and I have no clue why I felt the urge to write such an in depth response to this. It's late and I'm delirious. I should go to bed.
