Link not working for me, but if this is the adaptation of Night Watch then I’d avoid it with a barge pole - I’ve read all about how it uses the original material as a source ; never a good sign
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Understeer is when you hit the wall with your front end. Oversteer is when you hit the wall with your back end. Horsepower is how hard you hit the wall. Torque is how far you move the wall when you hit it!
I've tried editing the link without success, however if I copy & paste the text into a new tab it does work!? I think this is going to be totally new, being in the states I was unaware there had been any productions of Mr Pratchett's work.