It’s rude to stare,” said the troll. Its mouth opened with a little crest of foam, and shut again in exactly the same way that water closes over a stone. “Is it? Why?” asked Rincewind....

Besides…where Rincewind went’ – he lowered his voice – ‘trouble followed behind.’Ridcully noticed that the wizards drew a little closer together.‘Sounds all right to me,’ he said. ‘Best place for trouble, behind.

‘Luck is my middle name,’ said Rincewind, indistinctly. ‘Mind you, my first name is Bad.’