Continuity mistake: When the purser's safe falls through the ceiling, we get to see the safe come to a rest, and we can see the door to the safe is still perfectly in position and still closed. The next shot looking down on the safe now shows the safe with the door now fully opened.
Other mistake: When showing the animals outside of the cabin, the shot of the deer is obviously stock footage. The video quality doesn't match the rest of the movie. (00:28:40)