Related Clues:
- Possible result of a gunshot
- Boot up
- With 21-Across, begin from scratch
- Horror film reaction
- Piercing scream
- Outset
- Machine button
- Turn a key, perhaps
- Word next to an arrow in a maze
- One end of a maze
- "___ the Revolution Without Me" (1970)
- Scary movie sound effect
- Zero hour
- Involuntary jerk
- Step one