If you really want to upset a witch, do her a favor which she has no means of repaying. The unfulfilled obligation will nag at her like a hangnail.
Terry PratchettVimes struggled to his feet, shook his head and set off after it. No thought was involved. It is the ancient instinct of terriers and policemen to chase anything that runs away.
Terry PratchettThese weren't encouraged in the city, since the heft and throw of a longbow's arrow could send it through an innocent bystander a hundred yards away instead of the innocent bystander at whom it was aimed.
Terry Pratchett