On June 21, 2007, a 13-year-old girl was severely injured on Superman: Tower of Power. Shortly after the start of the ride, a cable snapped which fell and entangled the girl. Though she was able to remove the cable from her neck before the ride reached the top, it was still looped past her feet during the "drop" and shattered her left femur while severing both feet on the way down.[3] The operator heard the cable snap and acknowledged unusual screaming as the car climbed, but failed to hit the emergency stop button before the ride reached the top (after the drop, the ride cannot be halted).[4] Doctors were able to reattach her right foot. The ride was closed for two weeks and later reopened; however, it was removed from the park not long after.
http://en.wikipedia.org/wiki/Superman:_Tower_of_Power
http://en.wikipedia.org/wiki/Krug_Park_ ... r_accident
(in short this is why there's no roller coasters in Omaha, Nebraska.
http://en.wikipedia.org/wiki/1979_Sydne ... Train_fire
On Saturday, August 1, 1998, a 12-year-old boy fell off the log chute. As his log-themed boat neared the top of the chute, the boy began to panic and stood up to reach a railing. The ride was stopped, but the boat began to fall. Losing his grip, he fell off the chute, falling onto the landscaping rocks. O.D. Hopkins Associates, Inc., the manufacturer of the ride, inspected it and found that the ride was in proper working order. The boy died from the injuries received after falling off the chute. It was the park's (then Camp Snoopy) first major accident.
http://en.wikipedia.org/wiki/Log_Chute
Baywatch Water Show
Geauga Lake
On August 17, 1996, 22 people were injured during a Baywatch-themed water ski stunt show at SeaWorld of Ohio. The boat driver lost control after the boat allegedly experienced mechanical failure. The boat crashed five rows deep into the show's stadium resulting in 17 people being taken to area hospitals and five more treated on the scene.[15] During the accident investigation, the owner of the boat, World Entertainment Services, Inc., of Winter Park, Florida, was charged with three marine regulation violations unrelated to the accident.[16]
What I learned from looking into roller coaster incidents is that Six Flags Great Adventure has had incidents that caused quite a few safety innovations in the industry. The air gates in the station were implemented because of an incident on Lightnin' Loops in the 1980's where a woman ran across the platform and tried to board the train which was already dismissed. The seat belts that were installed on all wooden coasters were because of an incident on Rolling Thunder where a employee ignored safety precautions and got ejected from the train, this happened in I think 2002.