Class time!
If you're already familiar with Prince Rupert's Drops, you can skip to the second video. Of course you'll miss some cool high speed video.
Otherwise, watch the first video first.
Side note -Prince Rupert will not get upset.
[youtube]http://www.youtube.com/watch?v=xe-f4gokRBs[/youtube]
That was certainly cool, right?
Next
This is where you get to see a bullet disintegrate after striking the large glass end of a Prince Rupert's Drop.
[youtube]http://www.youtube.com/watch?v=24q80ReMyq0[/youtube]