Revealing mistake: In the last scene that we see Maggie and Jack before they are kidnapped, when the bed covers fly off their beds, you can see that they are suspended by their corners. This is particularly obvious when they are lifted up. The middle of the quilt sags while the corners are lifted. (00:22:25)
Revealing mistake: When Tink visits Peter at Wendy's house and pulls the rug from under his feet, if you look at his legs, Peter jumps up before the rug is pulled. (00:33:15)
Revealing mistake: After arriving in Neverland in the bedsheet parachute made by Tinkerbell, there is a shot of Peter poking his finger up through the bedsheet to make a hole for him to rip open. However you can clearly see a small pre-made tear in the sheet for where he could easily poke his finger through and rip a hole in the fabric. (00:34:25)
Revealing mistake: When Peter gets out of the water, (after the encounter with the mermaids), he stands up and looks over Neverland. When he does this, the background is obviously a greenscreen shot, because matte lines are visible on Peter. (00:49:20)
Revealing mistake: When Tinkerbell is waking up all the Lost Boys and announcing Peter Pan's return, we see a shot in which Tink flies around a curly-headed boy. When she does, you can see the wire used to move the figure around his head. It is most visible when the boy turns his head toward the right side of the screen. (00:50:20)
Revealing mistake: In the shot of Tinkerbell flying across the screen with the vine (to trip up the Lost Boy twins) if you look closely you can see the wire that is attached to the vine, which is being used to pull it across. (00:52:50)
Revealing mistake: When Smee stops Hook from his suicide attempt, the gun is accidentally shot off and the bullet hits one of the small model ships in Hook's little water tank. When it shows the ship (on fire) sinking down under the water, you can see the small rod devices that are actually pulling the ship down into the water. (01:01:05)
Revealing mistake: When Rufio brings the sword down on the rope holding the slingshot, you can hear the intended sound effect, but the rope is not cut. (01:05:20)
Revealing mistake: When Captain Hook reveals the blackboard with the "lesson" written on it, he underlines the word 'Hate' with chalk. However you can clearly see a faint smudged line already under the word (from a previous take) exactly where Hook draws the line. (01:05:45)
Revealing mistake: When old Peter recalls going to Wendy's nursery when he was younger, there is a scene of him trying to catch his shadow from the wall. Yet you can see his real shadow, cast on the mantle and wall to his right. (01:33:25)
Revealing mistake: In one shot when a group of the Lost Boys are catapulted up into the air so that they can land on the side of Captain Hook's pirate ship, when they all hit the wooden pillared side it can clearly be seen to bounce as they land on it. It is possible to give some leeway on their weight making some effect - but not so much as to make the wood 'bounce' like it is made of soft material. (01:46:30)
Revealing mistake: When the biggest "lost boy" curls into a ball and rolls down the gangplank scattering pirates, he was obviously a dummy. (01:48:10)
Revealing mistake: Near the end of the film, when Pan climbs over a snow-covered brick wall (and just before he re-acquaints himself with the dog in the dog house) the brick wall jiggles twice as he climbs over top, as though it was made of styrofoam. (02:06:05)
Revealing mistake: Many times during the film when characters are flying, it is clear that they are flying on a harness due to their stiff, rigid movement and also due to the bulkiness that will suddenly appear on their back. It is especially noticeable at the end when Tootles sprinkles the fairy dust over himself and flies out the nursery window. (02:09:20)
Revealing mistake: During the big fight between Peter and Hook, Hook scratches Peter on the arm with his hook. If you look closely when this happens, you can see the hook bend on Peter's arm, a rubber hook with fake blood on it to make a realistic scratch.
Revealing mistake: When the kids are having the big battle with the pirates on the ship, they have that gun that shoots out eggs. You can very easily tell that in one shot there is a fake rubber chicken in the basket on the top, and in the very next shot it is a big fat live chicken.
Revealing mistake: When Peter sees Tink in a night dress, the shots from behind reveal an obvious doll. Note how it does not have any fluffy hair (or any hair at all) as opposed to Tink's.
Revealing mistake: During the pirate ship scene where Peter's kids are lifted in the net, the sea in the background is a blatant backdrop with a very obvious blue painting with zero detail.
Revealing mistake: Set lighting screens are reflected on the office guy who's recording the baseball game.
Revealing mistake: When the red-haired mermaid kisses Peter, she extends her arm and you can see the wrinkles of her disguise's fabric next to her wrist.
Answer: Neverland very much runs on "If you believe, it will happen" which is what Tink means during the meal when she says "If you don't imagine yourself as Peter Pan you won't be Peter Pan." So by the rules of Neverland, as soon as Peter believed it was real it was then real. The dinner was trying to teach him to believe as, in Neverland, if you don't believe it then it won't happen.