Just watched the new Poseidon movie. The original, done way back in the 70's, was full of mistakes, mostly where the set designers had had trouble thinking upside-down or the carpenters just didn't think when making the sets. You'd think in a remake of the film they'd be very careful of that, perhaps even build every set right way up and then flip them. But no, the modern version has a number of similar mistakes as well. About 2 minutes after the ship rolls over, our heroes are crossing an elevator shaft and a grill on the wall is the right way up. Grills have slanted vanes to stop the dust getting inside, but this one, when the ship was upright, would channel the dust into it. And not long after, our intrepid ex-fireman doesn't know basic Rule One of firefighting - aim the extinguisher at the base of the fire, not 4 feet into the air. Good thing the door was hot but the fire had already gone out! And my favourite one of all, the multi-story theatre room with balloons everywhere - which presumably weren't helium-filled and were drooping down sadly before the ship flipped, because the still are now. Guys, helium balloons would still be the right way up! Anyway, you get my drift. Check out moviemistakes.com, a great site for picking the nits out of your favourite movies, if you want to see a few more.
Movie Mistakes - Poseidon