About 24 hours ago, I bought a box of 30 pieces water ice. I put them in the freezing compartment and when I came from work I was expecting a nice chilling ice.
But when I opened the freezer, I saw through the shrink wrap that almost all bags are still filled with liquid. I was mad on my self and suggested I should had removed the shrink wrap because that's probably the reason.
So as I was removing the shrink wrap, I dropped one of the bags and it hit the floor; after that the liquid immediately turned into ice. With that leading example, I started slamming each bag against the edge of the freezer and like 80% of them did the same: they turned into more or less hard ice.
How does this phenomenon occur? And does this happen under rare conditions or is that what happens to each water ice if you just watch in, in the right moment?
Here you can see one of the bags that just got frozen partly:
And this is the box the bags were sealed in: