Things that scare me right up:
Swimming pool drains(part of the circulation filtration system) and have actually killed people or sucked their bowel out by suction.
Plus they look sinister too with the water rippling over them. *SHUDDERS*
That's exactly why I really really really hate say old china faced dolls.
Oujia board I wouldn't have one in my house, full stop...
Spiders (especially big ones)
Wasps,bees,hornets,beetles,cockroaches, and simular.
Feeling of being trapped
Street gangs and chavs
Screaming,shouting,yelling makes me cover my ears and feel scared.
Things that can cause a disaster in the house to cause a fire or explosion,
Scares me ALOT
Everything from faulty electrics to faulty boilers, or thin gas pipes.
Not the actual item scarying me but the what IF it causes a house fire at night(especially) or explosion risk,
Yes I got many smoke alarms but certain things still make me very paranoid when not serviced or maintained well.