Related Clues:

• Really strange
• Like many an M. Night Shyamalan film
• Goosebump-causing
• Stranger than strange
• Causing fright
• Like 'Twilight Zone' episodes
• Goose-bump raising
• Nightmarish
• Very odd
• Like things that go bump in the night
• Kind of creepy
• Acetylsalicylic acid
• Hard to explain
• It's usually used in twos
• 'Hair of the dog' alternative