Nasty, brutish, and short treatise on xenophobia. The plot means to disturb, but of course comes to all the appropriate narrative and ideological conclusions–the oppressed are liberated; the oppressors punished–so in fact proves quite reassuring. The fun here is all in the art direction, which is gleefully gritty and visceral. I’m still fuming over Avatar, and District 9 offers another reason to hate Cameron’s movie: Its utter cartoonishness, not just in the animated sequences but throughout. That is not a problem here; when the pale, sweaty, infected guy barfs black bile on his birthday cake, you feel like he got some on you.