Tower of Terror. I'm not a wuss (generally) but I have an elevator phobia - yes, seriously. I went on there anyway because I love the Twilight Zone, I'm a fangirl of the original series. Screamed so hard I lost my voice...
Dinosaur I got freaked out by, but I'm not sure quite by what... maybe just the jostling? I just didn't like that one...
I won't go on Everest because of motion issues, but the thought of it freaks me out. Teacups I went on once and never will again - same motion sickness issues! Not exactly *scary* though.
I agree with the trip there - we either drive from NY (and see plenty of accidents on the way!) or else fly (which is petrifying as it is). And germs!!
ETA: One I forgot about was BTMR. I loooooved it as a kid (along with Space Mountain). But when I took my son on it for the first time, I had to literally hold him in so that he wouldn't fall out!! He met height requirements, but he was sliding under the bar and leaning over the side - not trying to, either. He had the time of his life but I was too chicken to bring him back on it for a few years.
And Test Track also freaks me out because I stayed off it one time with the baby while DH rode with the big kids. Well, they had a ride stoppage, and then an emergency evacuation. Everyone that was waiting there at the entrance ended up leaving - still no family. Ambulances eventually pulled up and I went and asked a CM if everything was alright, and she just said "some people got hurt, but I can't tell you any more than that." I was freaking out, because EVERYONE had gone and left by then, and only my family was missing! It turns out that they were on the last car to get evacuated - they were fine, it was someone else who got hurt, and it wasn't even ride-related. But I had gone through every possible worst-case scenario in my mind while I waited for them!
OK, last one... I saw Space Mountain with the lights on (we were on the Transit Authority when the lights in SM came on - I know there's a
Youtube video of it too) and it just looked really rickety...
No, no... last one THIS time... The bus ride from Epcot to our resort... DH and I were on a ride back late one night after Food and Wine. Most of the bus was adults and more than a few people were a little tipsy. The bus driver said it was his last night driving, and he was at first making jokes that people were laughing at, and then they stopped laughing the more he went on about how much he didn't like Disney. He almost swerved off the road once or twice, especially when making a turn, and everyone lurched - and to top it all off, he went to the WRONG resort. When he pulled into one of the All-Stars instead of the CBR, he just said "Oops!" and started laughing hysterically again. By this time no one was amused, and even though he went back to the right hotel... it was just creepy by the end. I don't know if he was drunk or just disgruntled or what, but that was a pretty intense bus ride.
Not because of the buses or drivers, but other sick passengers. The thought of someone coughing on us at the beginning of our trip and getting one, or some of us sick...
But, nothing is better than the adrenaline dump you get from riding stuff that scares you to death 
