Fourteen people were taken to the hospital after an accident on the Wild Thing roller coaster at Valleyfair amusement park in Shakopee on Sunday afternoon, authorities said.
Four others refused medical attention at the scene, said Bill Von Bank, a Valleyfair spokesman.
A 15th person later arrived at St. Francis Regional Medical Center, hospital spokeswoman Lori Manske said. All were treated and released by 8:30 p.m., Manske said. Most of the injuries were strains and sprains, she said.
The accident happened about 4:25 p.m. as the roller coaster train was slowing as it approached the ride station. One of the cars somehow separated from the train, Von Bank said.
Bailey Merchant, 12, of Shakopee, said she was in the rear car when the middle car began jerking and smoking. She said the car "fell right off the track" and made the last car turn over.
"We were jerked and twisted, and it started to hurt really badly," Bailey said as she left the hospital.
Her mother, Tracy Theis, said a nurse at St. Francis called to tell her of the accident. "It's very scary," she said. "You don't ever want to get that phone call."
Katelyn Churchich, 16, of Oakdale, who was treated for neck and back pains, said she was in the middle car when it happened.