Though Alexa feels that some power overpower her Will, but then she still gets conscious of what she is doing, before, because Alexa is not the one who release herself to the Alien's power control and it is the Alien's power that takes control of Alexa's mind and Will, Alexa did not use to get conscious of what she does when the power takes over her except she uses the Alien's signal to power the power in check, but now that she is the one who gives herself to the control of the Alien's power, Alexa is conscious of what she is doing and what she does
Alexa sees the fire she set around herself, the fire is just set around her like a circle and not to destroy anything around her, before, since it is the Alien's power that takes hold of Alexa she will have probably destroy things around her
