This happened when I was in primary school aged about 10, long ago. The headmaster occasionally visited classes and tried his hand at teaching. On this particular occasion, he took offence at some boy’s behaviour and sent me, apparently a trusty lad, to his office to fetch his strap from the drawer in his desk. Both office and drawer were unlocked as was the custom in those days. I ran there and back and completely failed to inspect the strap or to have a few trial swings. I do have recollections of its leather smell and texture. Alas, the strap was not used but its presence did have a calming effect on the class.