An employee discovers hidden cameras in the office and takes it upon themselves to find out what is going on...
Your protagonists walks on the beach every morning. One day they find this unexplainable surprise. Continue the story...
Inspired by [Howl]Flufffrog
You see a report of a missing person on the news. You ignore it, until two minutes later when they show up on your doorstep...
A struggling writer gains sudden fame but finds out that their work is being plagiarized.
You could focus on the character's emotional response, or create a plot following this scenario.