You might be familiar with an experiment that involves heating a container with a small amount of water in it, capping it and then cooling it. The cooling causes a difference in pressure and the result is very fun to watch.
My friend Keegan decided to try this experiment with an oil drum. Here is the result:
He was pretty proud of this experiment and claimed that it was the largest type of experiment he had seen on the internet. That was until we found this one:
Not exactly the same experiment, but the result is amazing.