Corrected entry: Watch as the little boy is suppose to be unscrewing the screw with the cross necklace when they are stuck in the vent. You can see that it is not the hand of a child but of an adult.
Corrected entry: The boat is struck in the middle of the ocean by a giant tidal wave. However, these waves do not appear in the middle of the ocean, it would not break but simply create a 'bump' that the boat would just go over. waves only break at coasts.