creepy

eerie

scary

horror

violin

strings

random notes

careless playing

bow

pick

blow

fingers

spooky

haunting

mysterious

dark

ominous

tense

suspenseful

frightening

intense

disturbing

unsettling

chilling

nerve-racking

hair-raising

blood-curdling

bone-chilling

heart-stopping

goosebumps-inducing

nightmarish

terrifying

petrifying

panic-inducing

dreadful

menacing

sinister

foreboding

macabre

ghoulish

ghostly

supernatural

otherworldly

unearthly

demonic

possessed

evil

wicked

diabolical

hellish

string

random note

careless play

finger

haunt

nerve rack

hair raise

blood curdle

bone chilling

heart stop

goosebump induce

panic induce

possess