Metal in microwave? It's science

To cut living expenses, I’ve starting bringing lunch to work and today’s was day-old Kung-Pow chicken.  While microwaving, the director of finance came in and did a double-take seeing a metal container in the microwave and asked how I wasn’t breaking anything.  I told him that metal is only a problem if it’s a certain type or if there’s crinkles where the metal can arc, so I bend the sides down.  He looked at me in astonishment a said “I there nothing that R&D can’t do?”  as if I personally were responsible for changing the laws of physics to prevent sparking.  I’m glad he has control of our company’s money….