You really aren’t the brightest spark in the closet of the LWNJs are you? Clear air turbulence can happen to any aircraft. It can’t be detected because unlike eg thunder clouds it doesn’t contain moisture. It’s caused by the convergence of air from differing wind patterns and all modern aircraft are designed to structurally handle it.
The injured people in the cabin didn’t have their seat belts on so they were either going to the toilets or are brain dead fools like yourself.
