So many times I have found myself watching some unsettling TV "documentary" show (or more likely these days, a spooky youtube) and having to slowly creep to bed terrified in my own house.
It's almost comical. Me, a grown adult, brushing my teeth in the corner with my back pressed against the wall, just in case "something" tries to ambush me.
A huge part of it is, I now know, the soundtrack on these programmes. If you pay attention they almost all use a similar thrum of bass frequencies verging on the inaudible, which tap into something really primitive in your brain to create that sense of unsettling fear and dread. If you mute the volume, there's no fear at all.