VICE World News says a spokesperson for the park told them it was actually six runners who suffered back and neck fractures.
In operation since 2001, the Whimsical Ride goes from 0 to 112 mph (180 km / h) in just 1.56 seconds, which means roller coasters are “the fastest roller coasters in the world.” According to park officials, this is the first time runners have suffered fractures since Do-Dodonpa entered service 20 years ago.
Fuji-Q Highland and the ride’s builders, Sansei Technologies, have apologized to the injured riders, but both say they are perplexed as to the cause of the sudden havoc.
Just for comparison, the maximum acceleration of the trip is north of three times the force of gravity. If that doesn’t mean much to you, it’s essentially equal to the G-forces astronauts endured at launch.
A major Japanese newspaper reported that one of the bikers who said she was injured admits that she may have leaned forward during the ride. But nonetheless, injuries like hers are incredibly rare. The International Association of Amusement Parks and Attractions says the chances of injury to yourself while riding a roller coaster in an American amusement park are approximately one in 15.5 million rides.