Jimmy Kimmel Live – Liquid Nitrogen Cloud

 Liquid Nitrogen is cold. REALLY cold.  -198°C (-321°F) In this demonstration, we literally make a cloud. Adding the boiling water to the liquid nitrogen creates a violent reaction that vaporizes the water. At the same time the effects of the cold liquid nitrogen cause the vaporized water to condense back into tiny drops we call a cloud. This is my favorite all-time science demonstration.