... beer in the freezer. The beer, under pressure, was liquid. The instant the cap was removed the beer froze.
- happened to my beer once, quite baffling . Could be used as magic by someone in the profession?
As for milk - my experience with milk 'straight from the cow' (=unpastorized) is that it seems to be water that freezes (sometimes forming like tiny needles of ice), so it probably depends on the protein, fat etc. content as well?
Sisemen's picture in #18 is easily explained. The milk on the doorstep would have turned to slush at just below 0' and expanded, but it would not have been solid enough to burst the bottle. My freezer is about -15' and I suppose as Ian 16th said, the frozen milk must have formed a solid plug.
The beer bottle phenomenon is easy. As soon as you open the top, the pressure drops causing a drop in temperature, turning the contents to slush. If the beer is colder, it will burst the can or bottle.