Start on all fours, reach the right arm up and back, then thread it under the chest toward the left side, resting on the back of the right shoulder and arm with the palm facing up.
Rest the head on the floor.
From there you have two options: 1) Staying in that position and reach the left arm up toward the sky, or 2) Wrap the left arm over the back to bind with the right hip or leg.
Repeat on both sides.
Form tips
Keep the weight evenly distributed across both legs, twisting in the upper back.