This one happened recently actually,
So, we were having french toast for breakfast (my favorite), and I went to get the powdered sugar out of the pantry. I grabbed a small container of some white powdery stuff that I assumed was powdered sugar. And, being the sugar craving creature that I am, I opened it, stuck my finger in and licked it. I can still taste it! It was not the delicious sugar I was expecting, but baking powder instead! It was horrible! I'm glad I didn't dump it all over the french toast though.