[Alf]

We had one we used to call Catweazle (he was the spitting image of)


Once in his class, I borrowed a pen off him, and I was chewing on the pen whilst working (as some people do) he came running up to me, grabbed the pen, put his foot on my desk and rubbed the pen against the sole of his shoe and said "now chew on it"

I thought that was a bit odd, but effective.