Guruji made several rounds to each student adjusting and occasionally smacking students and teachers. Each time he smacked someone I jumped. A senior teacher looked at me quizzically, wordlessly.
A woman with scoliosis had two straps on her torso, one below the armpits the other on the ribs just below the chest. An Iyengar yoga pad was placed on the dorsal spine under the straps. She was in Ardha Uttanasana with her arms stretched forward on the trestle, hips drawn back forming a right angle. Guruji came over looked at her and smacked her on the back. The convexity dropped, the back was balanced.