I had a geography teacher, "Pokey" Whitehead, who had the most amazing
talent. Incidentally, kids today don't seem to use nicknames. My 14
year old get furious with her old Dad when I refer to her form tutor,
a Mr.Almond, as "Nutty Almond".

Anyway, Pokey would be writing away at the blackboard but apparently
in the reflections in his glasses, could see what was going on behind
him. He would spin round and with no more than a millisecond's
hesitation, aim a piece of chalk with an accuracy that would do any
professional darts player credit. We would burst into applause. I
guess that sort of skill wouldn't be allowed in today's litigious
world.

Jack