Ultra Slo is a website which houses a collection of videos in slow motion. I particularly enjoy the water balloon video found at the link above. I would utilize this video in a class discussing energy. While the water is trapped inside the balloon, it possesses potential energy and when the balloon is popped, the water begins moving and is a wonderful example of kinetic energy. Other great videos for science education included at this url are the videos of the waterfall moving, a drop of water in a puddle, clouds moving, and dew falling. It is amazing what something looks like once you change the speed of which you normally observe it.