A 63-year-old female presents to the clinic with complaints of chronic mid-back pain. Osteopathic structural examination reveals T12 to be extended, rotated left, and sidebent left. You decide to treat the patient with a muscle energy technique. You place the patient in a position in which T12 is flexed, rotated right, and sidebent right. You then ask the patient to move into a position of extension, left rotation, and left sidebending against your resistance. After 3-5 seconds, you tell the patient to rest and reposition the patient to engage the restrictive barrier. Which of the following muscle energy techniques was utilized in this case?