If I meet my old teacher from hell, I probably give him a punch on the eye. He would call me over, shove his hands into my trousers, grip the abdomen by the skin and pull me up wedgie style as high he can pull. Hurts like hell. Another time he made me write one thousand lines. To a kid its eternity. Did not get the famous ruler rap on knuckles by the old Chinese language spinster. But one Ah Neh teacher rap me on the forehead with a ruler and blood spurts out. Now permanent scar like 3rd eye. Different teachers have favorite torture tools then.
The old Chinese Language teachers are the worst kind. Their teaching method in primary schools is somewhat similar to chanting. The punishments were numerous, from standing on chairs to exposing your privates and pinching them. The smacking on hands with rulers are very common. These memories left permanent scars in my mind.