(sorry for the double post) Hop aboard the Scenic Railway, the steepest passenger railway in the world! located at Scenic World, in the Blue Mountains, Australia. www.scenicworld.com.au
I didn't think to take a picture or video of this, but I was at a local carnival that had this weird ride called 'Gravity' that consisted of a small, horizontal cylinder that you climb inside, where there are 2 circular tubs that riders sit in and it looks claustrophobic. Then the ride op closes the hatch and riders are left in nearly total darkness while the tubs spin, and IDK if the tubs also spin upside down along with the cylinder or not. From the outside all that an observer would be able to see is the cylinder spinning, not knowing what's going on inside.
I actually found a POV of a coaster at Pattaya park, and it is a doozy in terms of sketchiness. It looks super rough and the cart barely makes it over any of the elements. The cart also looks similar to the one on the unopened Formula One coaster.
I'll post this photo for you. Taman Festival Bali's only coaster. It's still in mystery as no one is able to explain that "extremely" rare looper well!