io9 has a regular feature they call Concept Art Writing Prompts. They post a piece of art and invite readers to submit stories based upon the illustration. I've started writing (very) short stories as a warm-up to my real writing. This one is based on a piece by Sacha Goldberger.
Fruzsina knew they were teasing her. She knew making her pose like that was their way of poking fun at an old lady. What they didn't know was that she knew, and that she was fine with it. They also didn't know that she'd been watching them for seven weeks and knew exactly where the heroin was hidden and that in just a few minutes they were going to be on their hands and knees, groggily pawing through pools of their own blood, searching pointlessly for their missing teeth.