Check out the scene in which Jasmine is in the tunnel fleeing the city. She sees the city of Los Angeles exploding in her rearview mirror. She grabs son Dylan and runs down the tunnel. Watch the slow motion scene in which she turns around to look behind her. It is painfully obvious that she is carrying a fake child. You can also see the prosthetic boy when she first tries to kick the door open to the janitor's room. By the by, what is it about that little room that saves her, her child, and her dog from the vicious alien inferno??