Ok, so imagine a dude (who looks like either Will Smith or Sam Worthington) running around with a machete slaying zombies/infected people/zombies/opposing armies/um....zombies/aliens/zombies/zombies/zombies.
a)"Get the zombies!!"
b) "Get the ALIENS!!"
c) "GET THE ZOMBIES!!!!!"
d--and perhaps my personal favourite--"Get Sam Worthington!!!!"