Grape Balls of Fire: http://popsci.typepad.com/popsci/2007/01/grape_balls_of_.html
Seriously, who hasn’t immolated something in a microwave? The cool thing is, this trick only involves FOOD… the stuff you are SUPPOSED to be putting into a microwave! Love what happens when you cover it with a tall glass. Way cool.
Thx to the Shadowguild mailing list for the link.