Instant vapor - Boiling water freezes instantly in Siberia

What happens to boiling water by -41°C ? The Russian version of this video got incredibly popular. It was broadcasted on few prime TV channels. I gave two TV interviews already. Few more reporters contacted me. It keeps going all over the globe: US, Europe, Asia, South America. I never thought some simple school physics would get so much attention :) HD Russian version is here: http://www.youtube.com/watch?v=AzKr1QmuBh8