Counter-rotation should be evident in nearly every ski turn to varying degrees. The only time I would not expect to see counter is in a very basic wedge turn, or in children that have not developed fine motor skills yet. So what is counter-rotation? According to the PSIA, "counter-rotation describes the movement when the upper body turns in one direction as the lower body (legs) turn in the opposite direction". Out on the hill, counter-rotation is observed when you see the legs turn across the hill towards the end of a turn and the upper body stays focused facing more down the hill. This is also known as turning the feet and legs against a stable upper body. Counter-rotation is greatest during the transition between turns and smallest in the fall line.