![Planet 51 mistake picture](/images/screenshots/154000-154999/154894_sm.jpg)
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.
![Planet 51 mistake picture](/images/screenshots/155000-155999/155802_sm.jpg)
Continuity mistake: After Chuck and Lem leave the comic book store and get into the military car, at the beginning of car pursuit the "no parking" sign pole changes position between shots. First it is right beside the windows, in next shot its distance is much farther away.