Pedagogic measure

«… The next picture… shows our third tutor standing on his head. He was a large, formidably athletic Lett, who walked on his hands, lifted enormous weights, juggled with dumbbells and in a trice could fill a large room with a garrison’s worth of sweat reek. When he deemed fit to punish me for some slight misdemeanor (I remember, for instance, letting a child’s marble fall from an upper landing upon his attractive, hard-looking head as he walked downstairs), he would adopt the remarkable pedagogic measure of suggesting that he and I put on boxing gloves for a bit of sparring. He would then punch me in the face with stinging accuracy.»

(V. Nabokov, Speak, Memory)