Really scared

I dont quite catch it~I mean,there r so many things that r much too vague~
Like,who killed reese?spensar?without any evidence?
if that "outer space"thing aimed for a typical american or a hero,why would it end choosing an ordinary housewoman?and that will continue to move on with "its" life?!
man,that's just so confusing~!
well after all,the movie DID threatened me^^   舉報