Factual error: In the scene where the survivors are first in the mall, you can see a store called Roots with a Canadian beaver logo. While the movie was filmed in Canada, it is supposed to take place in the USA where Roots has a different logo.

Revealing: As Ana is driving away from her home, when we see her car driving from a shot high above, we see a car crashing in to a gas station making a huge explosion. However the trees a few feet away from the explosion don't move. The shockwave would have made them react at least a bit.

Continuity: When Ana hands over the file to Cora, Cora grabs the file on the side. When it cuts she grabs it on the top of the file.

Visible crew/equipment: When Michael is about to open the door where he finds the janitor, there is a close up shot of the door handle where you see the reflection of three studio spotlights.

Continuity: When Ana is standing by her car she is standing at the end of the back seat window. When it cuts to Luis come running out the door she has stepped a feet or two backwards.

Continuity: When Ana is done talking with Dr. Dandewar she gets to Cora's desk and places her files on the desk. When it cuts the brown file on the desk has moved.