This is pretty cool. Slice a grape in half, but leave the last bit of skin intact, holding the halves together. Then, microwave it. When I tried it, I immediately got small flares (plasma?). The link in the title has pics of little plasma balls. How cool is this? And how many microwaves will be filled with cut grapes and nuked into oblivion? And (most importantly), why does this happen? Thoughts anyone?
YouTube is full of videos of this. Here's one (not mine):