Surely you've eaten grapes before, but did you know of the destructive potential of those small succulent spheres? Observe [video=youtube;NFNzu3GanK4]http://www.youtube.com/watch?v=NFNzu3GanK4&NR=1&feature=fvwp[/video]
You have to prepare them correctly for destruction, by slicing them in half with the skin still connected at the bottom. Also note that the fumes aren't exactly healthy
Grapes. Who knew? I mean, after all, who would have thought that I contain the necessary ingredients for a bomb? Well, besides the old iodine+alcohol trick, but everyone know that!
What the cheese born terrors has the world come to? Exploding grapes that explode more than twice, the concept of tripping over seven cars without falling, the idea that climbing a porcelain wall will grant 26 people the ability to dance, and the fact that if you disrespect a fish it will plot to destroy the world.
Eggs work too. In some sense. Take raw egg. Place in microwave. Microwave for ~1:30. Egg explodes as soon is it touches a cold surface afterwards. (Before it cools.)
I believe it's the same principal as why ice cracks when put into warm water, the difference in temperature shocks it (not literally, but you get the point). Also it probably helps that the yoke of the egg probably gets a lot hotter then the rest of the egg, so it builds up pressure inside. That also sounds pretty dangerous, not to say the grapes aren't dangerous but egg bombs could potentially fling searing yoke on you.