1. Goosebumps. For many reasons.
2. Yes, the official names.
So, I'm going to say mileage may vary... haha. I think it's noticeably shaky because it's a mine cart ride, but it didn't seem problematic to me. I had a lot of fun on the ride.
I know someone with back issues who rode it and said they were fine. I also know someone who's a pillar of health and said it hurt them...