Continuity mistake: When the school janitor jumps from the roof then falls on a parked car, his head is turned to the right and it's obvious that it's a dummy. Two shots later, when Dr. Chafee puts his hand on the neck to take a pulse, the head is turned to the left and the body has changed position.
Continuity mistake: When Mara is one year old she has dark eyes. When she is older in the next clip she has blue eyes.
Continuity mistake: When the crew is fleeing the mayhem, DR Verner tells them to leave and that she will be right behind them - it is dark outside. In the next clip if you look at the windows behind her you will see daylight in the window blinds.