Have you ever driven a go-kart? It feels fast, doesn't it? Really fast. It's exciting and fun and you love the feeling of the tyres struggling for grip on the smooth track surface, screeching as you corner. You grip the wheel so hard, and every bump in the road travels through your body as you clatter around the track. Then you get out of the kart and look at the next lot doing it, and you wonder why they're going so slowly. They're not going any slower – the experience is fast, but the reality is not.