"A 12-year-old girl at an amusement park plunged more than 40 feet to the ground on Friday, seriously injuring herself when a safety net under a ""free fall"" attraction failed to catch her. Police declined to identify the girl or to elaborate on her injuries, but said she was from out of state and was visiting the Wisconsin Dells with her family. The area is a popular Midwest tourist destination known for its amusement parks. On its website, Extreme World amusement park describes its Terminal Velocity ride as a one-of-a-kind experience that offers an ""unattached, controlled free fall."" Participants are outfitted in a special harness, taken up in an elevator, and then dropped straight down into a ""huge airtube supported net."" After the girl was released for her fall, ""the net mechanism that was supposed to catch her and break her fall was not high enough above the ground to completely break the fall and she did hit the ground,"" Lake Delton Police Chief Thomas Dorner said. Dorner said the girl was treated by amusement park employees and family before emergency responders arrived, around noon. She was eventually transported to the University of Wisconsin Hospital in Madison by helicopter. Dorner said details of her injuries were not available, and hospital spokeswoman Lisa Brunette said she could not share them."