I should be better than this, I ought to be professional enough not to be distracted like this...
There I was, talking a group through the loan rules for juvenalia when I noticed one of the screens on the desks suddenly change colour. I stopped in mid word and gawped.
"I thought I'd have a yellow screen," said the trainee.
Ten minutes later I was derailed again when the same screen suddenly went grey.
"The yellow was a bit bright."