I have taken my mom who is 76 and totally blind to wdw several times now. The first trip, dumbo was her big thril ride. Not sure what happened but on our second trip, she wanted to ride everything. Tot is now her favorite ride. I told her about the inversion on rrc. After the ride was done her response was "is that it?". She said she couldn't tell we were upside down. I think a great deal of the anxiety factor is just in our heads. Not sure if that is helpful or not. It a good story that I wouldn't have believed if I wasn't there. Mom has since gone skydiving twice and can't wait to do it again.