Microwave Grape Plasma
Who thinks up stuff like this?
Its the damnedest thing you've ever seen. Please realize that although we haven't actually damaged any of the ovens we've done this with, the potential exists to damage or destroy the microwave that this is done in, and the possibility also exists that it could harm a human being if the proper precautions are not made. Please see to it that you are willing to pay $200 for a new microwave before you try this, and that you have a fire extinguisher nearby.
First of all who thinks of microwaving a grape, let alone a sliced grape? There is also a video link on the page showing the plasma being created. Unfortunately it happens really quickly or the video has some really low frame rates.
See how to create lightning plasma in your microwave using a grape: [Link]