Revealing mistake: After Lansbury makes her clothes start to move, her nightgown attacks someone and you can notice the strings that make the gown move.
Revealing mistake: When Ms Price plummets on her broom, a wire attached to her waist is visible.
Revealing mistake: Toward the end of the movie Miss Price has done the 5 word spell to animate the objects. When the sword "knocks on the Miss Price's door", the strings are visible on the front of the sword.
Revealing mistake: At Naboomboo, when the bear grabs Mr Brown and takes him to the cartoon beach, Mr Brown casts no shadow on the sand.
Revealing mistake: When the armored army attacks the Germans, one of them falls on the floor and rolls away. Note the grass and you'll see that part he falls on has a darker color, revealing there was a safety mat underneath. (01:51:48)
Revealing mistake: When the cartoon lion introduces Mr. Brown as the referee, he starts playing with the football and suddenly the ball and his hand become transparent.
Revealing mistake: When the white gown enters Ms. Price's house, before it starts dancing with Prof. Brown, a string holding it is visible.
Revealing mistake: When Ms. Price starts to make the shoes move, the strings attached are visible.
Revealing mistake: The first view of Portobello Road is a painting because the smoke from the chimneys is motionless.
Revealing mistake: When Ms. Price is trying to fly on her broom, a wire holding it is visible.
Revealing mistake: When the ghost army starts to move, the wires holding the drum sticks are visible.
