Revealing mistake: Junior can't get on the Crazy Dance because he is a milimeter too short. After seeing Murph (the 20-year old in his class) and Trixie (on heels) get on it, Junior speeds up the ride and all the kids on it get dizzy and barf everywhere. If you look where the puke shoots out, it's a bit obvious it's not coming from their mouths, but from a point behind them. Most obvious are Trixie and the boy wearing glasses.
Revealing mistake: In the climax scene, Joe is climbing up the Ferris Wheel. He is huge, and weighs a ton, but his strong hands do not break a single lightbulb on the framework of the wheel.
Revealing mistake: In the scene when the coach's friend (priest) also played by Martin Lawrence is praying with the team. Every time it shows the back of the coach's head in line with the front of the priest's head it has noticeably less hair than Martin Lawrence and you can tell it is a stand in.
Revealing mistake: The monitors in the hospital attached to Mr. Banks's wife and daughter didn't move, although they should have shown something important about the patients.
Revealing mistake: In the beginning when Nick gets a present from Fred you see that the background is fake.
Revealing mistake: After the old lady steals the meteor rock from Luigi, the big lady in red picks her up and throws her off down below into a moving car. She gets up and shocks the driver, causing the car to rear end the vehicle in front of it. If you watch closely, you see the engine top shift forward and the back of it lifts up. This reveals it is just a fake prop attached to the vehicle and not a real engine.
Revealing mistake: When Maleficent freezes the people in the church, the actors can't help moving.
Revealing mistake: During the opening musical number, right before Gary joins the large group of people for the dance, he accidentally kicks Walter out of frame. Watch closely though. His foot comes nowhere near Walter when he supposedly "kicks" him.
Revealing mistake: When Helvetica is on the rocket bike, her hair doesn't move.
Revealing mistake: When the prisoners commandeer the balloon and proceed to take flight, you can see a television antenna on one of the buildings in the background. (00:07:20 - 00:08:00)
Revealing mistake: When Mombi's headless body wakes up and begins to walk towards Dorothy, you can see a black, blurry haze around her neck in two shots, where an effect was used to remove it.
Revealing mistake: There are no keys in the ignition when Mike is driving the white truck.
Revealing mistake: During "Our Beginning," True Heart Bear takes a walk beneath the ship's deck to check on the sleeping cubs. But when Proud Heart Cat wakes up for a moment, his tummy symbol is visible - which he's not supposed to receive until arriving at the Kingdom of Caring several minutes later. (00:02:20)
Revealing mistake: When the cats are driving Mr Mason into the factory you can see skid marks on the ground from previous takes. (00:51:30)
Revealing mistake: Before Howard rises from the float as Turbo Man, we see several shots of the band marching down the street. In two shots you can briefly see Howard (as Turbo Man) in the background on the float. This is before he is shown coming out. (01:03:40)
Revealing mistake: When Alice tells the Mad Hatter how she appeared in Wonderland the hare's paw is superimposed on the teapot's handle as if the pot were flat or he was floating.
Revealing mistake: When D'Artagnan is in jail, right after he says "if you give me back my father's sword I'll cut your heart out", when Rochefort hits him in the back of the head you can see the sword handle never touches him. (00:33:15)
Revealing mistake: During the song "Remains of the Day", at one point, towards the end of the song, you can see metal wires in Bone-Jangle's wrists, revealing how the stop-motion character was kept together.
Revealing mistake: The first morning, when Robert takes Giselle to work, they enter atrium of the Time Warner Center (the well-known statue of the female Giselle admires is one of a set, the other is male), which is located at 8th Ave and Broadway, at the southwest corner of Central Park. Upstairs, when Sam tells Robert that she can't find where Giselle is from, and then when Giselle speaks to Phoebe, the very distinctive Johnson Lipstick Building (it's reddish and has three receding oval-shaped levels) at 53rd and 3rd is seen outside the window. The office scene is obviously not filmed at Time Warner, because it's impossible to be in an office at 8th and Broadway, on the West Side, and be next door to a building located at 53rd and 3rd, on the East Side. (00:35:40 - 00:40:35)
Revealing mistake: When Mia meets Asana at her birthday party and asks what she's been up to, Asana replies "oh, partying girl" with a British accent. Then when Asana is talking about Prince Jaques, the accent is gone. Then, at the slumber party, her accent slightly returns.