Halloween Bubbles

I missed posting this on Halloween like I wanted to, but I still wanted to share this spooky demonstration.  Dry ice experiments are useful for a variety of lesson plans, and adding a bubble to the mix only increases the possibilities for using this demonstration in a science class.  Since Halloween is close to the start of the year, this would be perfect for early classes on diffusion or osmosis in a biology lesson.  It could also be used for my chemistry lessons on partial pressure to explain why the gas from the dry ice sinks to the ground instead of rising.  Either way, it is a visually impressive demonstration that would be perfect for an end of October class.