Welcome!
So, what scares the shit out of me? I don't really know.
I've grown accustomed to a lot of horror movies as well as the sight of blood.
I can actually staple myself or cut myself, get a shot, give blood, etc... without fainting or anything.
If it was a spur of the moment thing where I absolutely don't expect it, then I might be startled.
Well, I have no problem with giving blood or getting shots at all. However, I will not staple or cut myself on purpose. I wouldn't faint, but that's just sick.
I think what would scare people the most is when they at least expect it.