Racism was not a problem on the Discworld, because - what with trolls and dwarfs and so on - speciesism was more interesting. Black and white lived in perfect harmony and ganged up on green.

My experience in Amsterdam is that cyclists ride where the hell they like and aim in a state of rage at all pedestrians while ringing their bell loudly, the concept of avoiding people being foreign to them.

I ushered souls into the next world. I was the grave of all hope. I was the ultimate reality. I was the assassin against whom no lock would hold. - "Yes, point taken, but do you have any particular skills?"

Anyway, it's like with bikes,' said the first speaker authoritatively. 'I thought I was going to get this bike with seven gears and one of them razorblade saddles and purple paint and everything, and they gave me this light blue one. With a basket. A girl's bike.' 'Well. You're a girl,' said one of the others. 'That's sexism, that is. Going around giving people girly presents just because they're a girl.

Corporal Nobbs had been disqualified from the human race for shoving

You were the kind of kid who couldn't see the difference between throwing rocks at a cat and setting it on fire.

That's the Ankh-Morpork instinct, Vimes thought. Run away, and then stop and see if anything interesting is going to happen to other people.