Water Turning To Ice

I wouldn't have thought that water turning to ice would make for a very interesting YouTube video. But here it is, and it is pretty neat. Just give the bottle a little shake, and there it goes!

Update: See this one too, at Google Video.

And my friend Pat explained the first video thus: "It's a super-cooled melt (water) waiting for a nucleation site. Once the crystals start to form, then it proceeds quickly."