Prompt 768 - Creative

[comicfan]

The arrow lay on pillow under glass. You remember it always being on the mantle of your grandmother's fireplace in her den. No one in the family would tell you the significance of it, but it always fascinated you. Last week, you buried your grandmother and today, along with the rest of your family, you've gone to clean up and close down her house. As you walk into the den there is a flash of light and the arrow is suddenly embedded in your chest. What happened?