The article claims that you're exposed to constant G-force in such an unround "circle". This is only partially true (if you're riding in the exact middle of the

The article claims that you're exposed to constant G-force in such an unround "circle". This is only partially true (if you're riding in the exact middle of the train), because the vehicle is so long. Riding in a rollercoaster is really a very different experience if you're a) sitting in the very front, b) in the middle or c) in the last compartment. I like to sit in the last seat :-) Imagine the very first part of the ride, a horizontal track with a sharp edge downwards: Especially the last compartment is really fun because you get the most forward acceleration in the beginning (when 90% of the train is "falling" downwards and the last compartment is still in a "horizontal" position. This leads to almost 1G forward acceleration while the first compartment is facing downward without accelerating too much because the biggest part of the coaster is still in a horizontal position).