Well, it was my turn to suffer the unsettled tummy through the night and this morning, and it's ENTIRELY my fault.
Following a really nice salad for dinner that was quite delicious and satisfying, later at home I binged on half a box of chocolate covered raspberry things. They'd turned out to be more delicious than I expected, and before I knew it, the damage was done.
No sickness or anything else untoward or unseemly, but what an awful feeling. Lesson learned? One hopes.