http://www.businessinsider.com/what-happens-when-liquid-nitrogen-freezes-2015-1

This one I liked but couldn't quote a word button or the major article. If you want to read it paste either the URL if you know how to do that or paste the title below into Google Search: It also has video so you can see the boiling liquid nitrogen and watch it dissipate heat by boiling and turn into a sheet of Nitrogen ice.

Freezing Liquid Nitrogen Creates Something Amazing

 Note: be careful of doing this at home because you might get frostbite during the reaction and lose the tip of a finger if you touch the boiling nitrogen turning into ice.