Any one who has had the chance to ride the 7DMT, I was wondering how bad of a ride is it? My fastpass plus window comes up in a couple weeks, and my Dad is going with us, he has had extensive back surgeries and has a kind of delicate back now, I was just wondering how rough and jerky it really is, and I know the cars move back and forth, but are they stationary in the loading area? he really wants to try this but I'm a little leary. He is just fine with star tours and EE, but RRC , TT, and BTM are a little to rough and jerky for him. I would love any opinion ya'll could give me!