When the room you get dressed in is dark, so you don’t discover until you’re at work that the boots you thought matched your outfit so well, in fact don’t.
And those of you who have no idea what I’m talking about, those greys do not match, and no, I’m not “on the spectrum”, despite the opinion expressed by one of our childrens’ psychologists some years ago. OK, I am, but only as much as everyone has to be somewhere on a spectrum, am I right?