Back in the mid 90's I was at DisneyWorld with family and friends. We went on Body Wars much to the pleasure of my mother who enjoyed the fantasic voyage and works in a hospital lab. It was that attraction that she discovered motion sickness.
The worst part was four hours later when we tried to get some ice cream her travel tourist wallet with the 7 7 day park hopping ticked and about 300 cash was missing from her bag. Back tracking through four hours of attractions is not my idea of a goodtime. Finally we get back to body wars and cast member informs that she did fnd the item with it's contents and sent it to lost and found.
The items were retrieved and we each got an extra scoop in celebration.
Hey, that's what cast tests are for....
You're correct, the motion was dialed back after a short period because it was making nearly everyone sick. Unlike Star Tours, there weren't a lot of good visual references, and the motion was quite rhythmic. The result was almost guaranteed to create nausea.
I was also to be on a Cast Member tour of the Finding Nemo Submarine Voyage show building "caverns" when our tour was canceled because they needed to get a sub out of dry-dock and had to lift the internal catwalks. Turns out even with the catwalks lifted an unloaded sub sat just a bit too high to comfortably navigate the caverns. Our CM "tour" group was quickly converted to "ballast". I did get a backwards ride in the sub with all the maintenance lights on. That was cool.