When we were at school, we had a strict PE teacher. I ended up with having to do many ‘additional’ PE exercises for not doing things correctly.
My classmate of mine turned up in his trainers for football as he had forgotten his boots. As a punishment he was given the 10 stokes of the slipper, in two sessions. The first one was before the class, then he was made to play football them the second five were given at the end. Apparently, the first five hurt and he knew the second five would be worse, but would have to wait an hour to get them.