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Revealing mistake: After a carriage rolls over Midshipman Poop-Decker's sword, he can be seen pushing some kind of trigger with his thumb to make the sword split in two. (00:05:05)
Continuity mistake: As Mr. Angel has the deck cleared of women, they change in number and the dresses worn.
Continuity mistake: Mr Angel is ordered to clear the gangplank of women. However the women change between shots in number and are totally different appearance wise.