Questions about the plane (plot holes)
How did they simulate the G-force of a plane taking off? They didn't have any equipment there to do that... and that would have been the most obvious giveaway to those inside that it never took off.
The sensation of lifting off the ground can't be faked. Anyone who's been in a plane knows the feeling.
So rain machine... wind machine... great.
Finally, what about the engine noise? Seems hard to fake that too. (but I can buy that they did with large speakers... though the sound would be completely different than it should be)