***Warning, Some Spoilers Ahead***
It's a little bit scary at the beginning of the ride (you're in an enclosed, dark, area & there are some scary looking things but it's all part of the "theming" of the ride & doesn't last for very long. I've been on the ride numerous x's & don't recall anything ever jumping out at me. On the way up (just before the drop, there is a large, scary decoration-a face/mask type thing-with glowing eyes hanging right above your head....I'd say that's about the worst of it. I wasn't sure whether my (then) 4 yo would like it & it turned out that she did BUT she made sure to close her eyes during some of the scary parts.
The drop on this ride is Great! Also, there is a cool element of surprise-close to the end of the ride that I totally wasn't expecting the first time (I won't give it away). I look forward to going on this ride every time we go to SW! Oh, and watch out you may get Very Wet!
HTH!