Sorbello Stitch
Sorbello stitch. Begin with a straight stitch from A to B. Come up at C, directly below A, and weave under the original stitch from above. Pull the slack through towards the left. Weave under the original stitch from above again, this time staying to the right of the first weave. Keep the tip of the needle over the loop and pull the slack towards the right. Bring your needle down at D to finish.