I was always fascinated by the reactions of boys, and in a few instances girls,when they were slippered. The one thing that always happened was the face going bright red.Very few cried, I think I only saw two boys crying, and never saw a girl cry, though I reckon I only saw about six girls slippered.
However it was the reaction of those slippered that interested me. Most would try to make no reaction, simply walking back to their desk and not rubbing their bottoms , but some would leap up and down shouting ouch.