Nitrogen Cloud

Boiling water is poured from a pot into a narrow barrel, in which there is double as much liquid nitrogen. A split second later a huge cloud emerges from the barrel.

HOW DOES IT WORK?
The liquid nitrogen has a temperature of minus 196°C. When it comes into contact with hot water, it immediately forms a gas cloud which escapes from the barrel. This effect is caused simultaneously by water droplets being thrown into the air, and by the cooling of the air and the condensing of the moisture in it.