Alright, so I was playing RCT1 earlier, and I built this rollercoaster. It was inverted. It took a few revisions and a lot of time to adjust the spacing (after failing to pass a couple of corkscrews), but I finally got it to complete it's circuit at about 29mph when it enters the station fully loaded*. Now, the way it was designed, I expected it to be far too intense to ride**. In the end it came to 8.93 excitement and 9.66 intensity, which was a pleasant surprise. The big WTF came with the 10.08 nausea rating***. The closest I ever came to that was with a suspended roller coaster (which is naturally nauseating and handles lateral-g's well), and that was a little over 9. With any other type of coaster, the highest I've gotten is maybe 7. They always got way too intense before they got a chance to become this nauseating.
Anyways, that's my wtf for the day. It may seem minor, especially to veterans of the series, but it really caught me off guard.
for the uninitiated, I shall explain some things:
*30mph means multi-car trains will crash when they collide, which is a big deal with the ever present threat of a station brakes failure
**In nearly all scenarios, an intensity much over 10 means you will have a hard time getting even the most hardcore thrill seekers to ride it. Also, after 10 intensity, excitement starts falling off rapidly. It is caused by high speed and high g-forces.
***Nausea makes people sick and they will throw up all over your beautiful paths. High nausea ratings can also scare away some of the guests with low fortitude, but it's not as bad for the ride as high intensity. It is caused by vertical-g's especially, but also lateral-g's to a lesser extent.