Bubbles get a bit rubbery when they freeze, so when they pop it happens really slow. It was around 15-20 F and this bubble took about two minutes to freeze. When it's colder they freeze really fast and will shatter more like glass. This bubble took about fifteen minutes to disintegrate. 7:46 AM Copyright 2009 Tom Falconer Photography. All rights reserved. www.facebook.com/TomFalconerPhotography Twitter