Facts:
1) The Gerstlauer trains running on NTAG use hydraulic restraints. Hydraulic restraints do not fail in such a way that it could cause the restraints to release. This is because the restraints fail in the locked position. It is physically impossible for the restraint to have released during the ride. The only way to release the restraints after they have been locked is either in the station via high voltage contacts underneath the train, or via special portable power packs that apply the necessary voltage to unlock the restraints that a mechanic can take to an evacuation location in the event of emergency stop.
2) The ride is computer controlled, and there are sensors on each restraint that measure the angle of the lap bar. The lap bar must be pushed in far enough to exceed the minimum required angle for safe operation, at which point the green light turns on. The lap bar sensor is not able to gauge HOW the bar is sitting in relation to the rider's mass and body shape, only the closing angle. Thus there is no way for the restraint to indicate whether or not the bar was in contact with the rider's legs.
3) The train cannot be dispatched (even manually) unless all restraints are secure and all green lights are on. The train was successfully dispatched, so we can effectively rule out lap bar failure from the cause of death.
4) The victim is very large in stature and appears to be very top heavy, with a larger midsection compared to hips and thighs.
5) The Superman investigation revealed a body type that would not be properly secured by the ride restraints. The typical body type is large midsection and disproportionately small waist and legs.
6) NTAG is filled with ejector air time.
8) Hydraulic restraints are fairly difficult to push down and require effort.
Speculation:
1) It is common to see ride operators struggle to fit obese people into the restraints on various rides. I myself have seen occasions where 2-3 strong ride operators were nearly horizontal while throwing their entire combined body weight into the restraint in order to make the green light turn on. While there are no reports of this happening on NTAG, it is certainly possible and even plausible that at least one operator had to exert additional force in order to close the restraint and satisfy the sensor. Whether or not this is accepted park practice I don't know, but it is fairly common.
2) According to reports that have since proven unreliable, the woman expressed worry that she felt the restraint was not securing her properly.
3) I believe the lap bar was pressed into her bosom or stomach, leaving ample room between the lap bar and her legs. The first pop of ejector air could have forced her stomach/chest out and over the lap bar, leaving her essentially unsecured in the seat. The next pop of ejector air launched her from the ride.
4) The woman likely panicked after the first moment of ejector air and didn't have the time, energy, strength or thought to re-fasten her lap bar around her waist. She also wouldn't have enough upper body strength to hold on to the restraints in order to prevent ejection.
5) A lap seat belt could have prevented ejection from happening, but newer rides with hydraulic restraints are believed to not need seat belts due to the statistical impossibility of the restraints failing. It's also impossible for the manufacturer to test the restraints for every possible human body shape and size. This accident required the perfect storm of rider body type, operation conditions and G-forces to happen. Thus I don't believe the blame can be placed on the manufacturer of the trains in court, and certainly not RMC.
6) As a result of this death, several things could and might happen. One thing they could do is implement new lap bars with tighter shin bars that restrict leg movement, like Outlaw Run. Another possibility is seat belts, but the park will favor the shin bars because that won't affect ride capacity. They may also reprogram the ride controller to force the restraint closing angle to be even tighter. They will also likely revisit their policies of how to secure overweight guests. Other rides like Outlaw Run should not be affected, but knee jerk reactions are always a possibility in these types of tragedies.