[EandM]

at 1:45 though the whole thing's cool...

https://www.youtube.com/watch?v=OTuZgwxzVJ8#t=108

[EandM]

Apparently:


Water normally freezes below 32°F or 0°C forming ice crystals. Impurities in the water can activate the crystallization. The absence of these impurities in purified water keeps it in a liquid state below freezing point. Hitting it or touching the ice activates the crystallization, since it’s already at freezing point, instantly turning the water into ice.

[Joe Bromley]

That's well good. Some party tricks right there!

[Nathanael Jones]

at 1:45 though the whole thing's cool...

https://www.youtube.com/watch?v=OTuZgwxzVJ8#t=108

Try it with a bottle of beer (Brill party trick) - 1:30 - 2 hours in the freezer,... bring it out, pop the cap off & tap it on the table - exactly the same thing happens.

[wfp master]

cool