is a creative heaven for MIT inventor types and practical physicists. We have build parties every Friday at 7 in N52-115, and anyone is welcome to come check it out and build something.
This build party, we got an old junky microwave from a thrift store, and put any interesting thing into it, before stripping it of its transformers and turning it into a welder
Our microwave doesn't have a turntable, but it does have an impeller, which is a piece of metal outside the oven chamber that spins and changes the magnetic resonance of the box to keep standing waves from forming.
Picturing that, or at least keeping it in mind, will give you a clearer idea of why the grapes arc inconsistently, why the lightbulbs don't stay on, etc.
Photos and videos, courtesy of Jordi Castell, posted here so you can hold your own Microwave-It night!
You can also see the original photo/images at http://evalu29.uv.es/~jordi/build_party/