http://youtube.com/watch?v=fSPzMva9_CE&mode=related&search=
something to share, while muggers are mugging 
click the link 
Supercooling is the process of chilling a liquid below its freezing
point, without it becoming solid.
A liquid below its freezing point will crystallize in the presence
of a seed crystal or nucleus around which a crystal structure can
form. However, lacking any such nucleus, the liquid phase can be
maintained all the way down to the temperature at which crystal
homogeneous nucleation occurs. The homogeneous nucleation can occur
above the glass transition where the system is an amorphousthat
is, non-crystallinesolid.
Water has a freezing point of 273.15 K (0 °C or 32 °F) but can be
supercooled at standard pressure down to its crystal homogeneous
nucleation at almost 231 K (-42.15 °C).1If cooled at a rate on the
order of 1 million kelvins per second, the crystal nucleation can
be avoided and water becomes a glass. Its glass transition
temperature is much colder and harder to determine, but studies
estimate it at about 165 K (-108.15 °C).2 Glassy water can be
heated up to approximately 150 K (-123.15 °C).3 In the range of
temperatures between 231 K (-42.15 °C) and 150 K (-123.15 °C)
experiments find only crystal ice.
Droplets of supercooled water often exist in stratiform and cumulus
clouds. They form into ice when they are struck by the wings of
passing airplanes and abruptly crystallize. (This causes problems
with lift, so aircraft that are expected to fly in such conditions
are equipped with a deicing system.) Freezing rain is also caused
by supercooled droplets.
An equivalent to supercooling for the process of melting solids is
much more difficult, and a solid will almost always melt at the
same temperature for a given pressure. It is, however, possible to
superheat a liquid above its boiling point without it becoming
gaseous.
