'My father always said that it was pointless to undertake a direct attack against an enemy extensively armed with efficient projectile weapons,' she said. Rincewind, who knew Cohen's normal method of speech, gave her a look of disbelief. 'Well, what he actually said,' she added, 'was never enter an arse-kicking contest with a porcupine.'

— Sorcery by Terry Pratchett, Peter Serafinowicz, Bill Nighy (Narrator), and 1 other (Discworld, #5)