If you take a grape, slice it almost in half, so just a small bit of skin remains connecting the two halves. 1) Place the grape in the microwave and set on high for 1min (doesn't take this long) 2) the two halves pickup and focus radiation into the skin "bridge" part. 3) The skin follows the process that happens when things are heated up eg. Solid (ice) > Liquid (Water) > Gas (steam/vapour) > Ionised gas (plasma) 4) These steps occur in about 0.2sec. Quite entertaining if you're bored. Anyone else done any good microwave science?