Outdoor School Corporal Punishment1

i can recall at my over zealous cp school now over thirty years ago that i used to witness cp outdoors i remember well one pupil being slippered by the gym master bending over holding the goal posts has it was being administered to his bottom , i can also recall a incident where a pupil was to be slippered outdoor but forgot to leave off his underwear under his shorts which broke the gym masters rules !!! the gym master made him strip bare and told him to remove his pants then replace them with just his shorts after that he was slippered again holding the goal posts , please bear in mind that our sports field was surrounded by houses for all to see also pupils / staff in adjacent classroom would be able to witness these events . Has anyone else got experience of this type of punishment at there school ?