Write about sneezing.
Damp and rainy weather was always the best time. Of late, not many people bothered to cover their mouths when they sneezed and that was all the devil needed. An innocent reflex to a common cold and out came their soul. It was brief, no sooner had it popped out, it was back in again, so speed was of the essence. Many a life could be altered in just one second. That was all it took to trap the human into a life of evil. They would be none the wiser, but very soon it would become all too clear.