Smashing Windows
One of the most dramatic moments in the film is when the Captain is on the bridge, and watches the water crashing through the glass as it gives in. As Cameron knew this was a powerful shot, he reshot the scene from several different angles, to create a dramatic effect. However, the water came in differently each time it was shot.
So while in one shot we see the windows breaking in a certain order – one, two, three four – in the next angle we see the windows breaking in a different order – one, two, four, three.