What were the logistics of slippering a whole class? Did all the victims form a queue at the front of the class, or were you called to the front one at a time, or did your all bend over in a row like the Bash Street Kids.
In the mass or group slipperings I took part in in primary and secondary school
In classroom it was mostly called out one at a time, but when such slipperings were done in the school hall or the gym etc we queued up, In ref, to bash street kids! The closest I came to that was on a school trip where the whole dorm of 8 boys had to bend over the end of their bed while an adult came round and slippered us.