Aliens - Drinking Bird Mistake
In the opening scene on Alien you pan over various parts of the ship. In the lunch room is one of those drinking birds that nods up and down. Those work by the moisture in the glass keeping the head moist and so heavier. If you're ever had one of those, you know that when the water in the cup evaporates below where the bird beak can reach, they stop rocking. As everyone was asleep in the pods for an extended period of time, the bird couldn't possibly be rocking.
on 04-16-2001 and