After the backwards part, it not only gave me a headache for the rest of the day, but the rest of the ride was blurry. After I got off the ride, my vision cleared up, but I don't think I'll be going on it again, or at least not for a while.
I also thought it was kinda weird that it had that effect on me because I go on RnR, SM, BTMR, and SpaceM and I'm fine on all those.