As a step is taken, a free leg will straighten the instant before it receives weight.

My free leg barely twitched as he pulled it out.

He began to panic, kicking out with his free leg.

The free leg of the layback is grasped by one or both hands and brought up above the head.

A common variation has the free leg lifted toward the back, typically in an attitude position, with the arms held above the body.

With the pads holding he lifted his free leg and set it higher than the other.

He had tried to lift the trunk, then to shove it off using his free leg, but that was not going to happen.

I said, trying to pull my leg free of his grasp inconspicuously.

A catch-foot position where the free leg is pulled above the head from behind.

A kick with my free leg gave me a little added momentum, and I thrust myself up the rest of the way.