Just wanted to respond and give an update, I was fine on FJ. And I was enjoying it far too much to let a little bit of lower back discomfort bother me. I purposely had not watched any YouTube videos because I wanted the first time to be a total surprise and I was screaming like a little girl at the first encounter with the dragon. Didn't feel the effects of motion sickness really, either. The only thing that really bothered me, as far as my back, was when we got stuck on the final lift for Jurassic Park. We sat there for about 5 minutes and for some reason sitting at that angle put just enough pressure on my lower back that if we had to sit there for terribly much longer, I seriously may have considered calling for help. Overall, a fun trip. But man, what a difference a year and the opening of Harry Potter makes! It was pretty crowded.