http://img67.exs.cx/img67/1608/intaminb ... ype16i.jpg
That's the prototype layout, and the Coasterball on RCT3: Wild! is the Intamin Ball Coaster. If RCT3's model is the same as the Ball Coaster, then the Ball Coaster is where you sit on either side of the track, your hang with no floor like X, you sit back to back like a Maurer Sohne Spinner, you boost to get to the top, I think, and the cars freely tilt, also like the Maurer Sohne Spinners, but on a vertical axis, instead of a lateral.