I've always wondered whether, as a blonde, I would go grey. Or even how it would happen if I did, as I thought the grey ones would just hide until there were enough one day that I would look as if I'd gone grey overnight. ANYway, I got my answer a week or so ago - there was one silvery grey hair, really quite long, much thicker than the normal hairs, just standing totally upright on the top of my head when I looked in the mirror first thing!! I laughed out loud, but I was shocked too and pulled it out instantly. Then I realised there must be more hiding, as I suspected, because this one had been quite long and I hadn't noticed it before.
Now I check for the cheeky bu$$ers all the time....!!!