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A zero G roll is a roller coaster inversion found on Bolliger & Mabillard inverted, sit-down, and floorless coasters and on Vekoma inverted coasters. On inverted coasters, this inversion is alternately called a "heartline spin" because its center of gravity is placed on the center of the rider's heart. On sitdown and floorless coasters, it is alternately called a camelback. The name for the roll comes from that fact that the rider feels a zero g-force, giving the feeling of weightlessness.
Inverted Sit Down Floorless Medusa (East) and Scream! have the same layout. | ||||||||
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