I can talk about this now, because I'm more or less over it. But for about a week, I have been suffering from dizzy spells. Not the more serious low blood pressure, fainting type of dizziness. No, this was more like occasionally experiencing a spinning sensation. In certain situations where I moved my head suddenly - especially when I moved position in bed, something I do a lot of - then I was getting really dizzy. There is something deeply, fundamentally disturbing about experiencing a really spinning room while you're stationary and gripping hard onto whatever you can before things settle back to normal. Fortunately these spells only lasted for a few seconds, but still very unsettling. I think I was suffering from something called BPPV (Benign Paroxysmal Positional Vertigo) - where, apparently, tiny calcium crystals get dislodged and go into the wrong part of your ear canal. Isn't the human body a crazy thing. But apparently this is quite common, especially for people over 50 (which I nearly am). And fortunately I didn't have to live with this condition for too long. But an unwelcome reminder that I'm going to experience more stuff like this as I get older.