Cider: Pasteurized

Ok so it's been 5 days since I backsweetened and bottled this cider.  Today I pasteurized it.  I followed these instructions:

http://www.homebrewtalk.com/f32/easy-stove-top-pasteurizing-pics-193295/

Basically it goes like this:

1.  Heat water to 190 degrees or so, then turn off burner.

2.  Place bottles in water for 12 minutes.

3.  Pull bottles out carefully with tongs and hotpads and place on counter to cool.

4.  Reheat water to 190.

5.  Repeat until all bottles are pasteurized.

I learned something today.  No, no bottles broke or exploded, which is good.  However, I noticed air bubbling (hissing) from the swing cap bottles.  At first I thought these types of bottles/caps just couldn't take the heat... But then I opened one.  BOOM!  Cider volcano!  Sure enough, I think I let them sit and bottle condition for 1 day too long.

Lesson learned.

Should be interesting as I go to open the rest in the coming weeks/months!