terribly
holy fuck
blood-curdling
bloodcurdling
terrify
pant-wettingly
transfix
threaten
aghast
holy catfish
terrorise
put the wind up
alarmistically
terrorize
curl someone's hair
worry someone sick
rain fire and brimstone
alarmingly
panic
fearfully
frighteningly
overfrighten
scare
consternation
bewitch
astonishable
kreistle
shake
funk
sinisterly
agh
gloppen
make someone's skin crawl
pants-shittingly
wild-eyed
dismayingly
make someone's jaw drop
hey
breathtakingly
horrified
aagh
bomb
scare the living daylights out of
antisensational
frighten the piss out of
scarecrow
scaringly
sicken
dismay
embarrassingly