When I accidentally knocked a glass beaker off the workbench in a physics lesson, the teacher asked the lab technician to bring the dustpan and brush and made me sweep up the broken glass. He then asked the lab technician to bring him ‘the slipper’.
There was a blackboard on wheels at the back of the lab and the teacher told me that he wanted me to come behind the blackboard with him because he wanted to slipper me. I tried to argue that it was an accident but the teacher said that I shouldn’t have put my bag onthe workbench and that I needed to have a quick slippering.