Phoenix

Revealing mistake: On the DVD commentary, the director says that he only had a handful of the experiment cubes in Dining Hall B and used cardboard cutouts for all the others. This is most obvious when Rain is walking through the hall alone to check on the first zombie: the cubes in the distance don't match the rigid rows of the ones in the foreground. (00:38:20)

Phoenix

Revealing mistake: As the team gets off the subway and heads for the door into the Hive, the Red Queen's POV shows a nifty infrared display in the lower left corner that marks their locations - it obviously matches up to the ones on screen. But the dots are static, while the people are moving. (00:19:20)

Phoenix