“Vimes 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.”

“Anything a person chases in life runs away.”

“Nick shook his head and found to his surprise that he did have tears left after all. He wasn't surprised by a talking cat. The world was crumbling around him and anything could happen.”

“If somebody had said last week that I'd be in… involved… with a human, I'd have knocked his head off. I mean, after howls of derisive laughter. But.”

“Beckendorf, whose legs were now working fine (nothing like being chased by a huge monster to get your body back in order) shook his head and gasped for breath. “You shouldn’t have turned it on! It’s unstable! After a few years, automatons go wild!”

“Once there was a little bunny who wanted to run away. So he said to his mother, "I am running away".
"If you run away", said his mother, "I will run after you. For you are my little bunny".”

“Paran shook his head, his only surprise the realization that nothing surprised him anymore.”

“Is there no hope? the sick man said;
The silent doctor shook his head.”

“She just took off running to the old Perkins place. He couldn't help turning to watch. She ran as though it was her nature. It reminded him of the flight of wild ducks in the autumn. So smooth. The word "beautiful" came to his mind, but he shook it away and hurried up to his house.”

“…he shook his head at the wonderful invention of folly in its guises and forms.”