Nowadays I take motion sickness pills before I go to any theme park. I'm pretty darn prone to motion sickness, and simulators only provoke it.
The first time I visited Universal Orlando (before I started taking those pills), I rode Forbidden Journey 3 times. The first time, I enjoyed the ride and couldn't find any words to explain it. I was a bit nauseous afterward, though. The second time, I prevented my nausea as best I could by looking at the behind-the-scenes type things and looking at how the ride worked to distract myself, but I still couldn't help but look at the screens and enjoy the ride. I mean, c'mon - it was only my second time on the ride! I felt a bit nastier after that.. The third time, I tried to let the ride envelop all my senses to see if I could completely enjoy the ride, and truly let myself into the chaotic adventure that is Forbidden Journey. Big. Mistake. For the remainder of my trip in Orlando, I felt sick to my stomach 24/7.