John brought some dry ice home on Saturday. Of course that meant he had to blow something up. You can barely see the coke bottle to the left of the brush pile. It stretched quite a bit before it popped.
Just for the record, it is loud when a coke bottle filled with dry ice explodes.
There was some dry ice left after he had filled the bottle, so he threw it in the pool. The bubbles don't show up very well in the picture.