A little movie called Attack The Block. This movie was raved about in a couple podcasts I listen to. It's a low budget affair and a fairly hard sell as a premise. Aliens land in a small part of London and it's up to a small gang of street youts and their mugging victim to stop the attacks on themselves and their neighbours. Surprisingly gory but also surprisingly well done given the low budget. Definitely not for everyone but worth it if the kind of movie I just described fits your taste in shlock.