The opening scene uses shallow focus and slow panning to show the burning White House, establishing a sense of unease. Next, a zombie charges the camera in front of the White House, setting up the main conflict of zombies attacking humans. CGI is then used to pull back and show the destroyed planet, with no signs of resistance against the zombies. Several shots throughout establish "rules" for surviving the zombie apocalypse, like shooting zombies or following safety protocols, as violations of these rules put the humans in danger. CGI is also used heavily to depict dangerous zombie encounters and the consequences of not following the rules.