Because it's Friday: Frosty, too frosty

Here's how to make a cold beer undrinkable in less than 10 seconds:

 

Supercooled liquids, slowly chilled below their freezing point, can become solid almost instantly when given a nucleus to freeze around (here, I suppose it's the sudden pressure that causes part of the beer to solidify? Not exactly sure what the mechanism is, to be honest). If you've ever heated a cup of water in the microwave, and then had it violently boil when you put a spoon in to stir it, it's kind of the same effect with superheated liquids. Don't do this, BTW -- Phil Plait has apparently had the same dangerous experience, as he explains in the blog post where I found this video.