Thriller writing prompts

Thrillers thrive on the ticking clock. Set the deadline in the first prompt and let each writer narrow the room as the story goes.

1. A hostage negotiator realises the kidnapper is calling from inside her own house.
2. A jury foreman is being followed home by another juror.
3. A nurse on a graveyard shift finds the same patient is admitted three times in one night under different names.
4. A train guard discovers all twelve sleeping passengers in carriage F have the same passport photo.
5. A whistleblower drops a USB stick in a stranger's coat at a coffee shop and runs.
6. The witness protection officer is the witness.
7. A bomb disposal expert is told to defuse a device built by her father.
8. A flight attendant realises the cockpit door has been locked from the inside for nine hours.