Evidently, something on the monster truck Natural High (seen above) broke and became airborn while the truck was doing donuts, and the debris flew over a safety barrier and into the crowd of 10,000. The debris, described as a "metal ring weighing 7 to 12 pounds," hit Sebastian Hizey (above, left) in the head while he was watching the show with his family. Hizey died early Saturday morning from the injury. At least one other spectator was injured, but their condition and identity has not yet been released.
Despite cries from the audience to stop the show, the show continued while medical attention was administered to the boy and the other injured party. An investigation into the accident is underway.
[Sources: Associated Press (via Yahoo); News Tribune; Newsday]