Emergency services personnel are seen at the Thunder River Rapids ride at Dreamworld south of Brisbane in Queensland, Australia, on Tuesday. Four people died after a malfunction caused two people to be ejected from their raft, while two others were caught inside the ride at the popular Gold Coast theme park. Dan Peled/AP hide caption

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Dan Peled/AP

At Six Flags Magic Mountain in Valencia, Calif., riders of the New Revolution Virtual Reality Coaster wear VR goggles to play a video game while the roller coaster twists and turns. Courtesy of Six Flags hide caption

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Courtesy of Six Flags

On Six Flags' Virtual Reality Coaster, The Ride Is Just Half The Thrill

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Cedar Fair, the parent company of Cedar Point in Sandusky, Ohio, reported record revenues for the first half of 2015. Jason Margolis/NPR hide caption

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Jason Margolis/NPR

Looking Up: Amusement Parks On Track For A Record-Breaking Year

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A woman slides on the nearly 300-feet Bristol Park and Slide project, an interactive temporary installation by artist Luke Jerram in the center of Bristol in southwest England Sunday. Leon Neal/AFP/Getty Images hide caption

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Leon Neal/AFP/Getty Images