Revealing mistake: When Scorpion and Johnny Cage are in the forest, you can see a car drive by in the far left corner. You have to look really close though.
Revealing mistake: When Woody falls out of the closet wrapped in the string lights he hears Buzz's voice, and in the next shot as Woody sneaks up to Hannah's room we see Sid's open door and doorway, which looks perfectly normal. However, after Woody rescues Buzz from Hannah's tea party they both stop in the hallway, and there's another shot of Sid's open door and doorway, only this time it's not normal to say the least. Five of the six hasps, bolts, and locks that should be (and normally are) screwed into and attached to the inside of Sid's door (one hasp mechanism, third one down from the top, is attached to the door's frame) are now actually kind of floating there in mid-air right beside the doorway, as if there's an invisible door there. Weird that Pixar artists deliberately did this, but it's bizarrely funny to see.
Revealing mistake: Near the end, as they approach LAX, the woman says there is nobody on the ground, that it's just the same as Bangor, but actually you can see a few cars moving on the ground.
Revealing mistake: During the monsoon scene, everyone is on a table trying to climb on the chandelier. Peter has been turned into a monkey, and his face is covered in hair and has the characterists of a monkeys face, yet in shots when they are on the table, like when the crocodile snaps at them on the table, just before Alan lifts Peter onto the chandelier, you can see the plain face of his stunt double, with no monkey features! Robin William's and Bonnie Hunt's doubles are rather obvious in these same shots too. (01:17:20)
Revealing mistake: As the leader talks to those assembled, the ball of fire in his hand is very transparent, showing that it was matted into the shot.
Revealing mistake: Casper is shown tying together the shoelaces of the students in Kat's class. When the bell rings and class ends they all get up and fall down. If you look closely you can see that their shoelaces are not tied together.
Revealing mistake: After Lucifer kills Gabriel, we get close-ups of Lucifer where the outline of his contact lenses are visible.
Revealing mistake: You can easily tell that the snow in the end is fake.
Revealing mistake: Near the end, Little Bear makes a fire and places something in Omri's hand. But when Omri puts out his hand, it goes right through the flame and stays there for a while, yet Omri doesn't even flinch. The fire is definitely large enough to burn him, and had this been real life, he would have been burned severely, no matter how strange his character is.
Revealing mistake: When Sara and Ms. Minchin are fighting in the attic, it is night time, but there is light coming through the cracks of the attic.
Revealing mistake: Marie and Nutcracker go down the river in a swan shaped boat, and Nutcracker is standing up on the back moving the boat along with large pole. In the water, you can see the reflection of the boat and Marie the way they are supposed to be. But the reflection of Nutcracker is not moving, and the pole is not reflected.
Revealing mistake: When Annie's boyfriend is killed, she runs over to Candyman and scratches his face open and bees pour out. You can easily see the head is a prop.
Revealing mistake: The width of the telephone pole behind Ebbie is about two-thirds the span of her shoulders but is just as wide when the background is blurred. (00:22:10 - 00:23:18)