Revealing mistake: When Jack Sparrow is chased in London, being on the carriage and looking back to his chasers, you can see the broad tire tracks of a modern vehicle in the mud. (00:16:55)
Revealing mistake: Just before he sees the droplet of water moving upwards, Jack moves three leaves to get through, but the top-right one is just held in his hand and you can see the cut stem of it. (01:42:20)
Revealing mistake: When Blackbeard threatens Jack with a pistol, he is heard cocking it, but when he holds it up to the camera we can see that it is only on half-cock. A pistol cannot be fired in the half-cock position, nor can it be loaded in the fired position, implying that either it is not loaded, or a technical error has been made by the film makers.
Revealing mistake: You can see the mermaid's underwear after she is given only a shirt by Philip. It appears to have red in it, which can be seen through the white shirt given to her.
Answer: The difference this time is that she actually kissed him before pulling him under. Either she breathes for him that way, or there's some magical property to a mermaid's kiss. They mentioned earlier in the film how a mermaid's kiss can save a man from drowning. Also, once the end credits start to flash on the screen (background is under water), about the 4th set, the screen lightens, and you can see two "mermaid" figures/shadows swimming toward the upper right of the screen. This is most likely Philip and Syrena. He became a "mermaid/merman."
Phixius ★