Revealing mistake: When Pintel and Ragetti are below deck with the cannon and hit with forks and other utensils from the Interceptor's canons, Pintel's eyes are seen. The yellow contact lenses that Lee Arenberg wears as Pintel are seen in this and other shots during the movie. (01:25:30)
Continuity mistake: When the Black Pearl and the Interceptor fire their cannons, a fork's prongs dig into the iris of Ragetti's wooden eye. Pintel then removes the fork with the wooden eye, but the fork's prongs are now lodged just beside the iris of the eye - not to be confused with swirls in that eye; and his grip of the fork differs between shots. (01:25:30)
Continuity mistake: In the brig aboard the Pearl, Jack sees Gibbs' flask in the pooled water around him. He reaches for it, holds it upside down to his mouth to drink from. There are two successive shots of him holding it to his mouth and then moving it away. The left sleeve leaning on his knee and the position of the long striped cloth that he wears around his waist differs in both shots. Also, the item on the floor to his left is in a different position in both shots. (01:25:55)
Continuity mistake: Aboard the Black Pearl, Pintel and Ragetti load the cannon with the chain-link cannonballs. As the cannon fires, in this shot from outside the port hole, the rungs of the steps on the side of the ship are to the right of the port hole. This shot has been flipped. The rungs are really to the left of the port hole, as seen when they load the cannonballs into the cannon and other shots throughout the movie. (01:26:55)
Other mistake: Pintel and Ragetti fire the chain link cannonball, and it hits the square rigged mast aboard Interceptor. There's a shot of two men falling from the top of the mast, just before Interceptor's mast crashes onto the Pearl. They are not part of Jack's crew, who are all accounted for aboard the Pearl later. The only one of Jack's crew to die is the Asian man, when he's stabbed by a pirate and falls overboard. Nor can they be Barbossa's crew, because they haven't boarded yet. (01:27:00)
Revealing mistake: Aboard the Pearl, just as Barbossa screams, "And the rest of you, bring me that medallion," seen to the upper right of the screen is a very apparant high cliffside. There are no cliffs, high or otherwise, where they are having the battle - they're in open water. (01:27:30)
Continuity mistake: Jack escapes the brig of the Black Pearl, goes up on deck and grabs the line from another and says, "Thanks very much." This shot's flipped. In the next wide shot of Jack (Tony Angelotti), he grabs the line again and swings across. The flipping was done in order to keep the Interceptor on the left of the screen and the Black Pearl on the right of the screen during the fight sequence. (01:28:15)
Visible crew/equipment: During the battle between the Interceptor and the Black Pearl, as Jack takes Elizabeth aside and asks her where the medallion is, on the top right corner is a film crew member's hand with a watch on it. (01:29:05)
Continuity mistake: Jack asks, "Where's dear William?" and Elizabeth runs over to the hatch that Will is trapped under. Tied to the hatch is a rope attached between two holes and lying on top is a piece of the broken mast and sail with more rope. In the wide shot of Elizabeth running towards the hatch and the following close-up, the ropes and twisted sail are either lying or tied differently on the hatch in both shots. This has nothing to do with the angle of the shot. (01:29:15)
Revealing mistake: Aboard Interceptor, Jack calls out, "Monkey!" as the monkey jumps onto the broken mast leading to the Pearl and Jack runs after him. In the very next shot of Elizabeth, who's trying to move the broken rigging from the hatch that Will is trapped under, the coloring is off in this one shot. The color of her dress, for example, is not vibrant, it is brown. This is visible on the region 1 DVD and on videotape. (01:29:25)
Continuity mistake: After the downing of the square rigged mast aboard the Interceptor, Jack spots the monkey running across it to the Black Pearl and he starts to follow. As Jack runs toward the mast in this shot, we see the broken end of the mast, rigging and sail that is lying at the Interceptor's rail. In the next shot, on Elizabeth's right the broken mast is seen with its rigging on it. The rigging is lying very differently on the mast in this shot than in the previous shot with Jack. (01:29:25)
Audio problem: Aboard Interceptor after the downed mast, Will is trapped below deck, as Elizabeth yells to him, "I can't move it," then Grapple and Mallet grab Elizabeth and she screams, "Will!" In the next shot of Elizabeth, she fights to free herself and we hear her scream, "Will!" again, but she's clenching her teeth and her mouth doesn't form the word Will. At almost the same moment that she screams, "Will!" the second time, Cotton's parrot squawks. (01:29:30)
Continuity mistake: Jack chases after the monkey on the broken mast leading across to the Black Pearl. When he gets there, Barbossa says, "Why thank you, Jack." Barbossa's left arm is up and he's holding the rope. In that first shot, much of his white sleeve is out. In the next shot of Barbossa, the white sleeve is mostly covered. Then in his next shot, much of the white sleeve is out again. (01:29:50)
Revealing mistake: Before Interceptor's explosion, in the close-up it's very apparent that it's not the real Interceptor. Some examples are, no rigging at the stern-most mast, at the railing there are no belaying pins with or without all the lines hanging from them, there are no cleats with or without lines and at least two of the swiveling mounts at the stern for the swivel cannons aren't there. (01:30:40)
Continuity mistake: Aboard the Black Pearl while watching Interceptor explode, Elizabeth runs over to Barbossa and yells, "You've got to stop it." While Barbossa holds Elizabeth, in the first shot behind her, the left shoulder of her burgundy dress is on her shoulder. In the next front close-up shot, her dress is off her left shoulder, then in the next shot behind her, her dress is on her shoulder again. (01:30:55)
Continuity mistake: Will stands on the Pearl's rail holding a gun under his chin, there are wide shots of everyone on deck, and close-ups of Jack, Elizabeth and Barbossa. The pirates and their captives differ between the close-ups and wide shots, in their appearance, position, and the way the pirates hold their weapons. Two examples: Will says, "And the crew. The crew are not to be harmed," in the close-ups Jacoby is right behind Jack, but in the wide shots he is much further away from Jack. Also in Barbossa's close-ups Pintel stands to the right of Cotton, but in the wide shots Pintel stands to Cotton's left. This type of occurrence happens throughout all of these shots. (01:31:10)
Continuity mistake: Just as Will jumps on the rail of the Pearl with the gun, in the back shot, his right hand holding onto the rope is shoulder level and wind is blowing his hair towards his face. In the next few front shots, his right hand holds the rope between sternum and waist level and his hair is not blowing at all. Then in the next back shot, once again his hand is at shoulder level on the rope, and the wind is blowing his hair towards his face. (01:31:25)
Revealing mistake: When Elizabeth gets out of the water on the little island, you can see a modern day bra through her dress. (01:31:25)
Continuity mistake: As Will stands on top of the rail of the Black Pearl, holding the gun, in the close-up and in the wide shots of Elizabeth, her appearance - the neckline of her dress and slip, differs. (01:31:30)
Continuity mistake: Aboard the Pearl, Barbossa says, "Did you not notice? That be the same little island we made you governor of on our last little trip." While he says those words, hair, etc, keeps changing. 1st shot - the wind blows their hair the same way. 2nd shot - Jack's ponytail at the top of his head is blowing in a different direction. 3rd shot - the wind doesn't blow their hair at all. 4th shot - their hair is blowing just like in the second shot. 5th shot - the wind doesn't blow their hair at all again. (01:33:55)
Answer: The curse needs the blood of everybody who took a coin from the chest. All the other pirates have already contributed so, as the movie opens, the only blood needed is Will's, substituting for his father. During the finale of the movie, Jack takes a coin from the chest, adding himself to the curse, so his blood is now required as well as Will's.
Tailkinker ★
But I didn't see any blood on the coins, and none of the pirates cut themselves, even before Will became part of the mix.
Yes, the other pirates did cut themselves before Will came into it, off-screen. The lack of blood on the coins can simply be explained as most of it dripping to the bottom of the chest, it being washed away by storms blown into the cave, or by the fact that they didn't drop that much blood on it in the first place.
When they had Elizabeth they believed she was Bill Turner's daughter, but they all thought the curse had failed, none of them had cut themselves so it makes zero sense.
They had been collecting back the coins for years. During that time they repaid their own blood. All they needed was the last coin and the blood of Bill Turner to break the spell.
lionhead