Instructions
Assume a wide grip on a pull-up bar and hang so that your feet are not in contact with the ground.
Once steady, bring your toes up towards the the area on the left side of your body, keeping you legs straight.
Using your core and keeping your legs straight, rotate your hips so that your straightened legs pass in front of you.
Allow them travel to the right side of your body before reversing the motion and bringing them back