Re: Another query about water/ice
 

I think the ice crystal forms because you're disturbing the state that the molecules were in by hitting the bottle on something.

[ QUOTE ]
also, if the temperature in your freezer got below a certain point (i think like -42C), the supercooled liquid water would spontaneously form into all crystals (e.i., ice) without the need of a nucleus crystal, right?

[/ QUOTE ]
Wiki says yes.