There are certainly a lot of psychic people here.
Not only do they know what is in the cargo hold, and where and how it is positioned, they claim they also know what was said in discussions they were not privy to.
They also knew how much fuel was on board, but remarkably, were not too sure whether this was enough to get to their destination.
Lots of conspiracy theories here. The only thing missing would appear to be the FACTS!
PS. The aircraft will only push back once the doors are closed. The doors only close when the cabincrew are satisfied it is safe to do so and they are ready to go!