The last thing of physics that John Cale demonstrates is The Nature Of Waves. Sound waves. He demonstrates this when he throws the grenade and the sound that it creates is so loud it stops his hearing for a little while. Another example for the sound waves is the bomb that took out the top of the capital. It created such a sound wave you could hear it from far away. Another one is when the shot the tank they all have to wear earmuffs to protect your ears or the sound will be to loud and make you go deaf. So he demonstrates The Nature Of Waves very well.