Your character has been kidnapped!
What is his/her first reaction? Is it a scary situation or just confusing? Maybe it was a pleasant aside that turned sinister, or maybe your character knows the kidnapper and doesn’t even realize what is happening?
Try to create a beginning, middle, and end to the situation…if it ends. Does the character lose his/her identity or sense of what is real? Does s/he dream about her “real” life? Does your character try to escape? How?
Your character has kidnapped someone! Who? Why? What happens?
Even if you don’t use this writing exercise in a story, thinking about your character’s reactions and choices can really help shape them into a more “real” entity with a better-defined personality. And, if you can really take yourself into such a scenario, you might just have a new story on your hands! Good luck!