This is a pretty cool trick with Corona beer. These guy put it in the freezer but it does not freeze until they tap it against a table and then you can watch it freeze near instantly. I didn't study any science in school, but it's pretty clear that fizz freezes faster than regular, non-bubbly liquid. So, when bubbles are created with the already very cold glass bottle, the bubble density drops and the outside of every bubble immediately freezes. That explanation is simply airtight. Get it, AIR tight?