When Samantha, the adoption agency worker, sees Eli in the dark hallway, she immediately runs into her office. She goes to her desk lamp to turn it on but instead of the lamp, the ceiling light comes on.
When the boys are playing basketball at the high school, Maria and Joshua sit against the wall by the basketball court. Behind them is a view of the city's skyline, and there are palm trees visible in the distance, in spite of the fact that the film is set in Chicago.
When the girl is picked up by the giant plant monster, there is a camera angle from the plant's point of view showing the girl. When the camera angle is switched to show the plant holding the girl, the girl is obviously not a real person, but a doll.