If you've ever accidentally put metal in a microwave, you've probably had bad things happen -- including having to buy a new microwave. But, microwave ovens are made of metal, so why is it so dangerous to put metal in one?

You may also have noticed that some microwavable food has metal liners to help cook the food, so why don't they spark and light up like foil? This video is the answer to all those nagging microwave and metal questions.

So, you can't use metal in a microwave, but that isn't stopping people from putting other things in there, like marshmallow Peeps, for instance.