He's been in a go kart, one of those kids ones, and loved it but no interest in motocross yet, my brother is trying to manage that for the moment as there's so much the lad is already doing. I don't think it'll be far off though. He loves motor racing and pretty much anything with a motor on it but they take his sailing and kite boarding and so many other things.
On your last line...disturbing indeed. And when it happens people will be like, I never saw that coming. Dumbasses.