I do wonder if passengers knew what was happening. Many might have been asleep. It sounds like there was a fair bit of turbulence on.
It looks like from the report that none of the cabin crew raised any concerns, so I'm wondering if people were pretty much oblivious and they went quickly.
I've been in flights that have experienced very mild turbulance and let me tell you, it's enough to wakup any sleepy passenger. With the amount of turbulance this plane experienced, there is no way anyone could have been oblivious to what was going on.
It looks like from the report that none of the cabin crew raised any concerns, so I'm wondering if people were pretty much oblivious and they went quickly.