My father who rode it in the time right before the official opening still swears that it goes upside down.
He and my mom were in the last seat and I was right in front of them. It was quite a ride. We have tried to convince him that it goes backwards up a helix but he just laughs at us and says he knows upside down when it happens.
He will soon be 95 years old! He and my mom still love the thrill rides!