Revealing mistake: The same clip of Curly getting hit on the top of the head with a lump of clay is shown twice during the clay fight.
Revealing mistake: Right after McQueen asks what the Ghostlight is, it cuts back to the other cars. Luigi is right next to the firetruck and some gas pumps. The firetruck's door is very reflective, and the gas pumps are visible in it. But Luigi is right by the pump, and he is not reflected in the firetruck's door. (00:02:10)
Revealing mistake: As Lulu is pulling her fishing pole out of the school steps, you see if you watch closely that the pole actually passes through the concrete of the steps rather than her lifting it over. (00:02:00)
Revealing mistake: When Charlie Brown stops to watch Snoopy sitting atop the doghouse, eating dog bones, the pile of bones never goes down even though Snoopy takes from the pile three times. (00:03:25)
Revealing mistake: When Oliver is holding the drunk, he says "We'll have it in just a jiffy." Arthur Housman (The Drunk) then repeats the line, and you can see Oliver Hardy mouthing the line as well.
Revealing mistake: When the lady throws Sylvester through the window, you can see there is a bump on Sylvester's head before he hits the tree.
Revealing mistake: When Melissa Duck runs down the aisle with the Scarlet Pumpernickel at the church, you can see that the other wedding guests in the background have no faces on them.
Revealing mistake: When the businessman rushes back into his bed after closing the window that Daffy opened, he is wearing his normal trousers.
Revealing mistake: When Junior Bear is spinning Pa Bear in the air with his legs, you can see Junior's head detach momentarily.
Revealing mistake: When the mice are feeding the cat, the cat sits up and a mouse passes through his head.
Revealing mistake: When Tom is sitting by the window looking at Toodles at the start of the cartoon, his tail is missing.
Revealing mistake: When Bugs is applauding with the audience after Daffy has blown himself up, his tail disappears for a second.
Revealing mistake: When the dog picks up the stick of dynamite, you can see the stick is not lit, yet it still manages to blow up.
Revealing mistake: When Stan falls off the balcony and into the fountain when throwing Oliver's bowler hat back at him, you can see water marks on the walls caused by splashes from previous takes.
Revealing mistake: When the ghost (Bugs Bunny) tells Scrooge that he is going to take him to "the man in the red suit", the ghost puts his arms up but the shadow does not.
Revealing mistake: When Bugs Bunny is walking away from Elmer Fudd, you can see a futuristic building in the background that keeps disappearing repeatedly when it reaches the end of the frame.
Revealing mistake: When Giovanni Jones performs his first note after Bugs Bunny takes over the conductor's duties, Jones's hands turn white.
Revealing mistake: When Tom is punctured in the rear by the fork that Nibbles is holding, his tail is missing.
Revealing mistake: When we see the duckling growing up to being Daffy Duck, the calendar behind him keeps changing months but the position of the days are exactly the same.
Revealing mistake: When Sylvester is on the run from Porky, he dives under the bed, but the cels of him diving were placed over the bed, so that he appears to dive on top of the bed and disappear.