I've just thought of a genuine Psychoaster!!!!! The Ghost Train at PBB! It is a cred (just ask Ben/Jake, hahahaha!) and it scares the crap out of me!
No? Not convinced? Hmmmmm
Right, now for the actual, sensible post.
Mazes/Horror walkthroughs scare the life out of me. I've never done any of the Thorpe ones, and I refuse to go to London Dungeons. Hell, even Hocuspocus Hall Live scared the crap out of me, and that's aimed at 7 year olds! At Thorpe fright nights you frequently see people running out of the exits screaming their heads off, and people talking about how scary it was.
This all proves that parks can do it. They can create a an attraction which gives a psychological thrill. We also know that they can create coasters which give a great physical thrill. The question is, will anyone ever be able to combine the two?