Then about two hours after dinner, still feeling comfortably full, I got the worst snack attack I've ever had on a fast day. Resistance was futile. I probably got through another 1000 cals in the next hour - cheese and crackers featured prominently.
I'm not particularly beating myself up - rather disgruntled but writing today off as a 16-8 day and will reschedule another fast day. But I am puzzled - this has never happened on a fast day before - I find them mostly fairly easy. I'm a bit low and a bit stressed but nothing major. Blowed if I can find any psychological or physiological reason for this derailment. Perhaps there isn't one - perhaps it's just one of those completely random things.
Oh well. Tomorrow's a new day, eh?