I know this is an old thread, so sorry for bumping it, but I thought I would add my two pennies worth to the thread.
Not sure if it counts, since it was only a dream I had, but I am scared it might happen to me in real life and because of the dream, I am off cake for a good while. OK:
Last night, I had a dream that I went to this
http://statics.192.com/estreet/origi...4/10748246.jpg department store's cafe and ordered some a slice of cake. Some other people sat near me had ordered some slices of cake as well. I take a bite into the cake, and what should I find - mice droppings!

The other people find mice droppings in their cake slices as well and when I threw my cake slice back onto my plate, the cake breaks into pieces to reveal that there was a dead mouse in the middle of my slice of cake!
Even though this was just a dream, I am off all cake products for the forseeable future!