While this insect won't be leaping into your body and try to eat your flesh, it'll still be pretty sickening. If you have arachnophobia, you might want to look away and hide in a box for exactly sixty-two seconds.
A box, already in a corner. You're half way there.
Within the name, we already have a scary concept, is it a human skull walking around on eight legs trying to attack you? Hopefully not. The Skull Spider is also nicknamed "Daddy Long-legs". That should probably hit a few light bulbs of this horrifying creature in your head from your nightmares. Because it should, it should.
But probably not as horrifying as clowns.