Back to the Mountain" (or Embrace Tiger, Return to Mountain) is a foundational Tai Chi movement known for its deep symbolic and physiological impact. It typically appears at the end of a sequence to ground the practitioner and consolidate energy. Grasping the Sparrow’s Tail" (or Grasp the Birds Tail) is considered the most important sequence in Tai Chi, often described as a "microcosm" of the entire art because it contains its four primary "energies" or movements: Ward off (Peng), Roll Back (Lu)