Do you have the slightest clue how much I had to pay to build a caterpillar rig inside my flat? And have you ever tried to make a caterpillar sick? It’s really hard, I bet you’ve never thought of that! To fill a tank of petrol, you need millions and millions, so many that I’m afraid to count. I have to keep replacing them (they don’t live very long), and when they’re sick it’s just a very small amount!