Amusement Parks - What Do You Mean?

I'm not really a big fan of amusement parks. So I can only describe different ways of describing how much I don't like them rather than what's actually in them. What do you call this crazy roller coaster with this a dead loop? Do you call it a dead loop when you are hanging upside down over there? In Russia, we would say like a dead loop, I think. Loop is like that. Whoa. Okay. You know what I'm talking about... Like the circle that you go on this little train and then the train goes like, whoa. That's just the roller coaster.