And you thought roller coasters were scary enough. A woman visiting Six Flags Over Texas on Friday died while riding the park's signature Texas Giant coaster, which reaches 14 stories high and was revamped just three years ago. Although the park will not specify how the woman died, witnesses claim she fell. The woman reportedly expressed concern to a park employee that she was not properly secured on the ride, but normal ride procedure continued. Although the Texas Giant was quickly closed down, the park itself remained open for the rest of the evening.