SpinBallCoaster

First off, I've searched to see if this is baked or not, but could not find any evidence....

Rather than having a roller coaster that rides on or under the tracks, have one that rides "in" the tracks. However, the cars are not linked up together. Each coaster is just a single-rider transparent ball that rolls through an enclosure of pipes.

Inside the ball is your chair that you are strapped in to. The chair has struts protruding from all directions on it that press up against the inside of your big, rolling ball. BUT, each of these struts have a small roller wheel mounted on the end of them.

The result is that your big ball is free to rotate and roll through the pipe track enclosure, and the chair itself can rotate inside the ball.

For added spinning effects while going through corners, the chair structure would be such that your centre of gravity is not in the geometric centre of the big ball. That way when curving through corners, you'd get this weird wobbling wavy motion as your body is pushed through the turns.

With a rotating/rolling body (you and your chair) set inside another rotating/rolling body (the big ball) you might get some neat-o motions going on.

Unlike the traditional roller coaster, every ride would be unique, as you could enter turns situated backwards, forwards, facing the sky, ground, etc., not to mention the fact that you'd be able to see all around you.

The whole idea of riding "in" the track might allow for more elaborate track design, such as corkscrews that occur in a straight line.