Roller coaster

Rail-based amusement park ride

A roller coaster is a type of amusement ride employing a form of elevated railway track that carries passengers on a train through hills, turns, valleys, and other elements, to exert abnormal g-forces on the body. Roller coasters are usually designed to produce a thrilling experience, though some roller coasters aim to provide a more gentle experience. Trains usually consist of open cars connected in a single line, and tracks are typically built and designed as a complete circuit in which trains depart from and return to the same loading station.

From Wikipedia, under CC BY-SA. More on occurri.