Related Clues:
- Things sometimes hidden behind paintings
- Heavy items dropped in cartoons
- Sad to say, gripping marine excursions often accompany these
- Museum installations
- Common Vegas hotel room amenities
- Fixtures behind paintings
- Hair-raising moments for air marshal with no hair?
- They might be cracked
- Hair raising devices for sailors
- Protection rackets?
- Seals' hair
- Burglars' targets
- Bicycle theft deterrents
- Many are set on Sunday nights
- Cracker boxes?