MrNelg

Revealing mistake: During the flashback when we see Bruce Wayne murdered, Thomas Wayne is beating up Joe Chill while in the background, Martha can be seen cradling Bruce's dead body. As she picks him up though, the animators forgot to remove the still frame so it appears as if there are two corpses.

MrNelg

Trivia: When the Hazmat team are dropping objects into the containment pod, they drop in a magazine called "G.A." On the cover are a number of titles regarding the making of the movie, including one that reads, "G.A.'s Lifestyle Advice: Go to the Movies to see Planet 51."

MrNelg

Revealing mistake: After Chuck steps on the toy duck, he looks up to see the alien family and their house behind them. However, there is no reflection of this on his visor, just an empty field and the trees beyond.

MrNelg