The video above shows a pretty dramatic example of supercooling at work. This is what happens when you cool water below its freezing point, but the water lacks any nucleation sites that are necessary to seed ice crystals. In other words, for water to turn to ice, it requires the presence of solid particles around which to start forming crystals. If the water is pure enough, you can take it down to ?48.3 °C (?55 °F) while still in liquid form. But as soon as you pour it out onto something solid, the above happens.
VIA [ TheAwesomer ]