Medium radius turns on lower Sundance. Good early edge change well before the fall line which gives nice round turns and good speed control. Two things contribute to your fall: the lack of a pole swing leads to rotating your shoulders into the new turn which puts your weight back and skids the tails of your skis. Then your arms come back putting your weight further back until your skis totally lose their grip and skid out from under you.
Medium radius turns on Pend Oreille. Good rythmic pole swing and plant which leads you into your turns with your center of mass forward compared to the previous movie. Very nice early edge change with your center of mass to the inside of the turn and down the hill before the fall line. Good angulation with leveling of your shoulders to the terrain. Things to work on: Always lead into the turn by relaxing (shortening) your new inside leg and rotating the thigh towards the little toe side. This will release your edges and prevent the occasional wedging which delays your edge change and turn entry. Work on decreasing the lead change between your skis by pulling back your inside leg beneath your hips. This will help keep your center of mass moving down the hill and give more control and power to your turns.