What explodes, but doesn't burn?

 How do you turn an ordinary soda bottle into fragments like these?!?



Well, you use this:
 



And you do this:
 



For a video (cheesy editing, huge [23mb] file, but fun!) of what happens next, follow this link (update: corrected the url, sorry!)

And for more fun with liquid nitrogen, YouTube has a bunch of other videos (a bowl of it dumped in a swimming pool, and exploding watermelon, etc!)