When I was a kid there wasn't awareness of house centipedes. I remember my first time seeing one as a kid, it was night time and I was home alone. Some of the most visceral fear of my life.
That's honestly why they creep me out the most. Spiders will generally be chilling out in a corner somewhere you expect to see them, doing their own thing, and not moving much unless directly disturbed.
Most of my experiences with centipedes involves them darting out from under a baseboard at night and scaring the shit out of me when I'm only half awake. Then by the time I realize what it was, it's already scrambled across the floor to disappear under some other piece of furniture.