Just for fun, I'll start. Castoreum (or beaver butt) is just one of the ingredients that could be called a natural flavor. But there are many other things called natural flavors that could be lurking in your food. Well never know what they are because the food companies wont tell us as they consider this information proprietary. What's your favorite secret ingredient? Discuss.
How about cochineal or carmine? A red coloring made up of ground up insect carcasses... CFR - Code of Federal Regulations Title 21
