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![iSpeed's Astonishing G-Force](http://travel.home.sndimg.com/content/dam/images/travel/video/0/02/020/0208/0208090.jpg.rend.hgtvcom.1280.720.suffix/1662094129165.jpeg)
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The Formula One themed iSpeed coaster in Italy's Mirabilandia park gets tested by one rider with a special G-force vest. The opening shot out of the pit produces a 4.0 positive force while a corkscrew creates a negative 1.0.