This video from June 2010 just had a recent viral surge after being featured on Reddit. When done correctly, science can be educational as well as very entertaining. And this high schooler shows us just how cool science can be with a very exciting science experiment conducted in front of the class with the help of a teacher.
They filled a classic 55 gallon steel drum barrel with a few inches of water, and heated it until it was steaming. By moving the boiling hot barrel into an ice bath, the change in pressure should cause the barrel to implode. It takes a good minute and a half of patience, but finally the barrel falls in on itself with a huge Hollywood-quality bang!