Here are some extra examples of the Ideal Gas Law in action:

Liquid Nitrogen is extremely cold. Watch what happens when it is poured on top of a balloon.

Here is a demonstration of a Fire Piston in action. A sealed compartment is shrunk incredibly small very quickly. Look at the effect at around 45 seconds into the video.

Lastly, check out this video of a glass beaker being heated up to extremely hot temperatures. Eventually it is exposed to a pool of cool water, you'll be shocked with what happens!