Revealing mistake: After Nuclear Man destroys the cab's hood, the shot changes and there's a thick string running behind him all along the car.
Revealing mistake: There are no keys in the ignition when Mike is driving the white truck.
Revealing mistake: When Ali Gator and Windy Winston are coming back from the barfight riding the atv's, Ali scratches his head and you can see where the green glove ends and the actors real skin is supposed to be, under the shirt.
Revealing mistake: When the chipmunks and chippettes and getting ready for the balloon race, Jeanette walks up to Simon and asks him what route to take to Bermuda. Pay attention to Theadore; he's supposed to be in front of Simon handing the chest of dolls to Alvin who is in the hot air balloon. After handing him the chest, he dusts his hands and moves his head a little while doing it. If you look at his head, it seems to cross behind Simon's even though Theadore is supposed to be in front of him. Simon's face may have needed to be seen, but still a mistake.
Revealing mistake: When the boys shoot the flaming arrows at the workers tent, it's painfully obvious they land in spots covered in fuel.
Revealing mistake: When Harry screams through the windshield of a car you can see the actor's mouth and teeth inside of Harry's mouth.
Revealing mistake: When Marisa has her back to her window and you see Mason tossing out his paintings you can see wires attached to the paintings.